12544402 has 32 divisors (see below), whose sum is σ = 21745584. Its totient is φ = 5376000.

The previous prime is 12544387. The next prime is 12544409. The reversal of 12544402 is 20444521.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 10169721 + 2374681 = 3189^2 + 1541^2 .

It is not an unprimeable number, because it can be changed into a prime (12544409) 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, 44502 + ... + 44782.

Almost surely, 2^12544402 is an apocalyptic number.

12544402 is a deficient number, since it is larger than the sum of its proper divisors (9201182).

12544402 is a wasteful number, since it uses less digits than its factorization.

12544402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 12544402 is about 3541.8077305241. The cubic root of 12544402 is about 232.3539113865.

Adding to 12544402 its reverse (20444521), we get a palindrome (32988923).

The spelling of 12544402 in words is "twelve million, five hundred forty-four thousand, four hundred two".