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BaseRepresentation
bin100101111100001011001
32100011101101
410233201121
5304240400
642351401
713365364
oct4574131
92304341
101243225
1177a065
124bb561
13346b49
142450db
1519856a
hex12f859

1243225 has 9 divisors (see below), whose sum is σ = 1548543. Its totient is φ = 990120.

The previous prime is 1243211. The next prime is 1243271. The reversal of 1243225 is 5223421.

Adding to 1243225 its reverse (5223421), we get a palindrome (6466646).

The square root of 1243225 is 1115.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 447561 + 795664 = 669^2 + 892^2 .

It is not a de Polignac number, because 1243225 - 27 = 1243097 is a prime.

It is a Duffinian number.

1243225 is a lucky number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5464 + ... + 5686.

21243225 is an apocalyptic number.

1243225 is the 1115-th square number.

1243225 is the 558-th centered octagonal number.

It is an amenable number.

1243225 is a deficient number, since it is larger than the sum of its proper divisors (305318).

1243225 is an frugal number, since it uses more digits than its factorization.

1243225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456 (or 228 counting only the distinct ones).

The product of its digits is 480, while the sum is 19.

The cubic root of 1243225 is about 107.5267645635.

The spelling of 1243225 in words is "one million, two hundred forty-three thousand, two hundred twenty-five".

Divisors: 1 5 25 223 1115 5575 49729 248645 1243225