12157025 has 6 divisors (see below), whose sum is σ = 15074742. Its totient is φ = 9725600.

The previous prime is 12157001. The next prime is 12157027. The reversal of 12157025 is 52075121.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 18769 + 12138256 = 137^2 + 3484^2 .

It is not a de Polignac number, because 12157025 - 2¹⁸ = 11894881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12157027) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 243116 + ... + 243165.

It is an arithmetic number, because the mean of its divisors is an integer number (2512457).

Almost surely, 2^12157025 is an apocalyptic number.

It is an amenable number.

12157025 is a deficient number, since it is larger than the sum of its proper divisors (2917717).

12157025 is an equidigital number, since it uses as much as digits as its factorization.

12157025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486291 (or 486286 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 12157025 is about 3486.6925588586. The cubic root of 12157025 is about 229.9371283730.

The spelling of 12157025 in words is "twelve million, one hundred fifty-seven thousand, twenty-five".