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12139254 = 233474783
BaseRepresentation
bin101110010011…
…101011110110
3211211201221000
4232103223312
511101424004
61112104130
7205116261
oct56235366
924751830
1012139254
116941446
124095046
1326904ba
14187dcd8
1510ebc39
hexb93af6

12139254 has 32 divisors (see below), whose sum is σ = 27555840. Its totient is φ = 3959496.

The previous prime is 12139249. The next prime is 12139277. The reversal of 12139254 is 45293121.

It is a super-2 number, since 2×121392542 = 294722975353032, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147 + ... + 4929.

It is an arithmetic number, because the mean of its divisors is an integer number (861120).

Almost surely, 212139254 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12139254, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13777920).

12139254 is an abundant number, since it is smaller than the sum of its proper divisors (15416586).

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

12139254 is a wasteful number, since it uses less digits than its factorization.

12139254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4841 (or 4835 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 12139254 is about 3484.1432232329. The cubic root of 12139254 is about 229.8250339149.

The spelling of 12139254 in words is "twelve million, one hundred thirty-nine thousand, two hundred fifty-four".

Divisors: 1 2 3 6 9 18 27 47 54 94 141 282 423 846 1269 2538 4783 9566 14349 28698 43047 86094 129141 224801 258282 449602 674403 1348806 2023209 4046418 6069627 12139254