157475861 has 2 divisors, whose sum is σ = 157475862. Its totient is φ = 157475860.

The previous prime is 157475839. The next prime is 157475863. The reversal of 157475861 is 168574751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124768900 + 32706961 = 11170^2 + 5719^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157475861 is a prime.

Together with 157475863, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157475863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78737930 + 78737931.

It is an arithmetic number, because the mean of its divisors is an integer number (78737931).

Almost surely, 2^157475861 is an apocalyptic number.

It is an amenable number.

157475861 is a deficient number, since it is larger than the sum of its proper divisors (1).

157475861 is an equidigital number, since it uses as much as digits as its factorization.

157475861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 235200, while the sum is 44.

The square root of 157475861 is about 12548.9386403791. The cubic root of 157475861 is about 540.0135581872.

The spelling of 157475861 in words is "one hundred fifty-seven million, four hundred seventy-five thousand, eight hundred sixty-one".