157919121 has 6 divisors (see below), whose sum is σ = 228105410. Its totient is φ = 105279408.

The previous prime is 157919119. The next prime is 157919141. The reversal of 157919121 is 121919751.

157919121 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 only one way, i.e., 157854096 + 65025 = 12564^2 + 255^2 .

It is not a de Polignac number, because 157919121 - 2¹ = 157919119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157919141) 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, 8773276 + ... + 8773293.

Almost surely, 2^157919121 is an apocalyptic number.

It is an amenable number.

157919121 is a deficient number, since it is larger than the sum of its proper divisors (70186289).

157919121 is a wasteful number, since it uses less digits than its factorization.

157919121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17546575 (or 17546572 counting only the distinct ones).

The product of its digits is 5670, while the sum is 36.

The square root of 157919121 is about 12566.5874842775. The cubic root of 157919121 is about 540.5197567687.

The spelling of 157919121 in words is "one hundred fifty-seven million, nine hundred nineteen thousand, one hundred twenty-one".