12290525 has 18 divisors (see below), whose sum is σ = 16508430. Its totient is φ = 9072960.

The previous prime is 12290521. The next prime is 12290567. The reversal of 12290525 is 52509221.

12290525 = 675² + 676² + ... + 700².

It can be written as a sum of positive squares in 9 ways, for example, as 5331481 + 6959044 = 2309^2 + 2638^2 .

It is not a de Polignac number, because 12290525 - 2² = 12290521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12290494 and 12290503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12290521) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2771 + ... + 5679.

It is an arithmetic number, because the mean of its divisors is an integer number (917135).

Almost surely, 2^12290525 is an apocalyptic number.

It is an amenable number.

12290525 is a deficient number, since it is larger than the sum of its proper divisors (4217905).

12290525 is a wasteful number, since it uses less digits than its factorization.

12290525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2945 (or 2927 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 12290525 is about 3505.7845056421. The cubic root of 12290525 is about 230.7757360702.

Adding to 12290525 its reverse (52509221), we get a palindrome (64799746).

The spelling of 12290525 in words is "twelve million, two hundred ninety thousand, five hundred twenty-five".