157901261 has 4 divisors (see below), whose sum is σ = 180458592. Its totient is φ = 135343932.

The previous prime is 157901251. The next prime is 157901347. The reversal of 157901261 is 162109751.

157901261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 157901261 - 2¹⁴ = 157884877 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 (157901221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11278655 + ... + 11278668.

It is an arithmetic number, because the mean of its divisors is an integer number (45114648).

Almost surely, 2^157901261 is an apocalyptic number.

It is an amenable number.

157901261 is a deficient number, since it is larger than the sum of its proper divisors (22557331).

157901261 is an equidigital number, since it uses as much as digits as its factorization.

157901261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22557330.

The product of its (nonzero) digits is 3780, while the sum is 32.

The square root of 157901261 is about 12565.8768496273. The cubic root of 157901261 is about 540.4993791502.

The spelling of 157901261 in words is "one hundred fifty-seven million, nine hundred one thousand, two hundred sixty-one".