12604157 has 6 divisors (see below), whose sum is σ = 13389498. Its totient is φ = 11862464.

The previous prime is 12604099. The next prime is 12604159. The reversal of 12604157 is 75140621.

12604157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 6791236 + 5812921 = 2606^2 + 2411^2 .

It is not a de Polignac number, because 12604157 - 2⁸ = 12603901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12604159) 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, 21518 + ... + 22095.

It is an arithmetic number, because the mean of its divisors is an integer number (2231583).

Almost surely, 2^12604157 is an apocalyptic number.

12604157 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

12604157 is a deficient number, since it is larger than the sum of its proper divisors (785341).

12604157 is an equidigital number, since it uses as much as digits as its factorization.

12604157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43647 (or 43630 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 12604157 is about 3550.2333726109. The cubic root of 12604157 is about 232.7222648098.

Adding to 12604157 its reverse (75140621), we get a palindrome (87744778).

Subtracting 12604157 from its reverse (75140621), we obtain a square (62536464 = 7908²).

The spelling of 12604157 in words is "twelve million, six hundred four thousand, one hundred fifty-seven".