812507157 has 48 divisors (see below), whose sum is σ = 1477552128. Its totient is φ = 417947040.

The previous prime is 812507153. The next prime is 812507167. The reversal of 812507157 is 751705218.

It is not a de Polignac number, because 812507157 - 2² = 812507153 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812507153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 65688 + ... + 77070.

It is an arithmetic number, because the mean of its divisors is an integer number (30782336).

Almost surely, 2^812507157 is an apocalyptic number.

It is an amenable number.

812507157 is a deficient number, since it is larger than the sum of its proper divisors (665044971).

812507157 is a wasteful number, since it uses less digits than its factorization.

812507157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11510 (or 11507 counting only the distinct ones).

The product of its (nonzero) digits is 19600, while the sum is 36.

The square root of 812507157 is about 28504.5111692869. The cubic root of 812507157 is about 933.1305290509.

The spelling of 812507157 in words is "eight hundred twelve million, five hundred seven thousand, one hundred fifty-seven".