157072157 has 6 divisors (see below), whose sum is σ = 172649694. Its totient is φ = 142792760.

The previous prime is 157072151. The next prime is 157072159. The reversal of 157072157 is 751270751.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 150160516 + 6911641 = 12254^2 + 2629^2 .

It is not a de Polignac number, because 157072157 - 2¹² = 157068061 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 (157072151) 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, 648938 + ... + 649179.

It is an arithmetic number, because the mean of its divisors is an integer number (28774949).

Almost surely, 2^157072157 is an apocalyptic number.

It is an amenable number.

157072157 is a deficient number, since it is larger than the sum of its proper divisors (15577537).

157072157 is a wasteful number, since it uses less digits than its factorization.

157072157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1298139 (or 1298128 counting only the distinct ones).

The product of its (nonzero) digits is 17150, while the sum is 35.

The square root of 157072157 is about 12532.8431331442. The cubic root of 157072157 is about 539.5517049854.

The spelling of 157072157 in words is "one hundred fifty-seven million, seventy-two thousand, one hundred fifty-seven".