12400525 has 12 divisors (see below), whose sum is σ = 15484500. Its totient is φ = 9850880.

The previous prime is 12400517. The next prime is 12400541. The reversal of 12400525 is 52500421.

It can be written as a sum of positive squares in 6 ways, for example, as 2019241 + 10381284 = 1421^2 + 3222^2 .

It is not a de Polignac number, because 12400525 - 2³ = 12400517 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2061 + ... + 5389.

It is an arithmetic number, because the mean of its divisors is an integer number (1290375).

Almost surely, 2^12400525 is an apocalyptic number.

It is an amenable number.

12400525 is a deficient number, since it is larger than the sum of its proper divisors (3083975).

12400525 is a wasteful number, since it uses less digits than its factorization.

12400525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3488 (or 3483 counting only the distinct ones).

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

The square root of 12400525 is about 3521.4379165335. The cubic root of 12400525 is about 231.4621719636.

Adding to 12400525 its reverse (52500421), we get a palindrome (64900946).

The spelling of 12400525 in words is "twelve million, four hundred thousand, five hundred twenty-five".