157112561 has 2 divisors, whose sum is σ = 157112562. Its totient is φ = 157112560.

The previous prime is 157112519. The next prime is 157112567. The reversal of 157112561 is 165211751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 153760000 + 3352561 = 12400^2 + 1831^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157112561 is a prime.

It is not a weakly prime, because it can be changed into another prime (157112567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78556280 + 78556281.

It is an arithmetic number, because the mean of its divisors is an integer number (78556281).

Almost surely, 2^157112561 is an apocalyptic number.

It is an amenable number.

157112561 is a deficient number, since it is larger than the sum of its proper divisors (1).

157112561 is an equidigital number, since it uses as much as digits as its factorization.

157112561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2100, while the sum is 29.

The square root of 157112561 is about 12534.4549542451. The cubic root of 157112561 is about 539.5979643577.

The spelling of 157112561 in words is "one hundred fifty-seven million, one hundred twelve thousand, five hundred sixty-one".