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12245500 = 2253191289
BaseRepresentation
bin101110101101…
…100111111100
3212001010200001
4232231213330
511113324000
61114244044
7206041111
oct56554774
925033601
1012245500
116a04253
124126624
1326c9977
1418aa908
15111d46a
hexbad9fc

12245500 has 48 divisors (see below), whose sum is σ = 28173600. Its totient is φ = 4636800.

The previous prime is 12245479. The next prime is 12245501. The reversal of 12245500 is 554221.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12245501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8856 + ... + 10144.

It is an arithmetic number, because the mean of its divisors is an integer number (586950).

Almost surely, 212245500 is an apocalyptic number.

12245500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12245500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14086800).

12245500 is an abundant number, since it is smaller than the sum of its proper divisors (15928100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12245500 is a wasteful number, since it uses less digits than its factorization.

12245500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1327 (or 1315 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 12245500 is about 3499.3570838084. The cubic root of 12245500 is about 230.4935839849.

Adding to 12245500 its reverse (554221), we get a palindrome (12799721).

It can be divided in two parts, 1224 and 5500, that added together give a square (6724 = 822).

The spelling of 12245500 in words is "twelve million, two hundred forty-five thousand, five hundred".

Divisors: 1 2 4 5 10 19 20 25 38 50 76 95 100 125 190 250 380 475 500 950 1289 1900 2375 2578 4750 5156 6445 9500 12890 24491 25780 32225 48982 64450 97964 122455 128900 161125 244910 322250 489820 612275 644500 1224550 2449100 3061375 6122750 12245500