12520157 has 16 divisors (see below), whose sum is σ = 13923840. Its totient is φ = 11187072.

The previous prime is 12520127. The next prime is 12520159. The reversal of 12520157 is 75102521.

It is a happy number.

It is not a de Polignac number, because 12520157 - 2⁶ = 12520093 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 (12520159) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74888 + ... + 75054.

It is an arithmetic number, because the mean of its divisors is an integer number (870240).

Almost surely, 2^12520157 is an apocalyptic number.

It is an amenable number.

12520157 is a deficient number, since it is larger than the sum of its proper divisors (1403683).

12520157 is a wasteful number, since it uses less digits than its factorization.

12520157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332.

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

The square root of 12520157 is about 3538.3833879330. The cubic root of 12520157 is about 232.2041220279.

Adding to 12520157 its reverse (75102521), we get a palindrome (87622678).

The spelling of 12520157 in words is "twelve million, five hundred twenty thousand, one hundred fifty-seven".