12557725 has 12 divisors (see below), whose sum is σ = 16109460. Its totient is φ = 9699200.

The previous prime is 12557723. The next prime is 12557729. The reversal of 12557725 is 52775521.

It can be written as a sum of positive squares in 6 ways, for example, as 737881 + 11819844 = 859^2 + 3438^2 .

It is not a de Polignac number, because 12557725 - 2¹ = 12557723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12557723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7936 + ... + 9385.

It is an arithmetic number, because the mean of its divisors is an integer number (1342455).

Almost surely, 2^12557725 is an apocalyptic number.

It is an amenable number.

12557725 is a deficient number, since it is larger than the sum of its proper divisors (3551735).

12557725 is a wasteful number, since it uses less digits than its factorization.

12557725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17360 (or 17355 counting only the distinct ones).

The product of its digits is 24500, while the sum is 34.

The square root of 12557725 is about 3543.6880506049. The cubic root of 12557725 is about 232.4361407846.

The spelling of 12557725 in words is "twelve million, five hundred fifty-seven thousand, seven hundred twenty-five".