12553749 has 24 divisors (see below), whose sum is σ = 20011992. Its totient is φ = 7534080.

The previous prime is 12553733. The next prime is 12553753. The reversal of 12553749 is 94735521.

It can be written as a sum of positive squares in 4 ways, for example, as 651249 + 11902500 = 807^2 + 3450^2 .

It is not a de Polignac number, because 12553749 - 2⁴ = 12553733 is a prime.

It is a super-2 number, since 2×12553749² = 315193227910002, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12553649) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3489 + ... + 6105.

It is an arithmetic number, because the mean of its divisors is an integer number (833833).

Almost surely, 2^12553749 is an apocalyptic number.

It is an amenable number.

12553749 is a deficient number, since it is larger than the sum of its proper divisors (7458243).

12553749 is a wasteful number, since it uses less digits than its factorization.

12553749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2677 (or 2674 counting only the distinct ones).

The product of its digits is 37800, while the sum is 36.

The square root of 12553749 is about 3543.1270087311. The cubic root of 12553749 is about 232.4116070507.

The spelling of 12553749 in words is "twelve million, five hundred fifty-three thousand, seven hundred forty-nine".