12557745 has 24 divisors (see below), whose sum is σ = 21902400. Its totient is φ = 6655776.

The previous prime is 12557731. The next prime is 12557749. The reversal of 12557745 is 54775521.

It is not a de Polignac number, because 12557745 - 2⁴ = 12557729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12557749) 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, 7276 + ... + 8834.

It is an arithmetic number, because the mean of its divisors is an integer number (912600).

Almost surely, 2^12557745 is an apocalyptic number.

12557745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12557745 is a deficient number, since it is larger than the sum of its proper divisors (9344655).

12557745 is a wasteful number, since it uses less digits than its factorization.

12557745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1749 (or 1746 counting only the distinct ones).

The product of its digits is 49000, while the sum is 36.

The square root of 12557745 is about 3543.6908725226. The cubic root of 12557745 is about 232.4362641806.

The spelling of 12557745 in words is "twelve million, five hundred fifty-seven thousand, seven hundred forty-five".