156870641 has 2 divisors, whose sum is σ = 156870642. Its totient is φ = 156870640.

The previous prime is 156870601. The next prime is 156870647. The reversal of 156870641 is 146078651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156375025 + 495616 = 12505^2 + 704^2 .

It is a cyclic number.

It is not a de Polignac number, because 156870641 - 2¹⁰ = 156869617 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 156870595 and 156870604.

It is not a weakly prime, because it can be changed into another prime (156870647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78435320 + 78435321.

It is an arithmetic number, because the mean of its divisors is an integer number (78435321).

Almost surely, 2^156870641 is an apocalyptic number.

It is an amenable number.

156870641 is a deficient number, since it is larger than the sum of its proper divisors (1).

156870641 is an equidigital number, since it uses as much as digits as its factorization.

156870641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 156870641 is about 12524.8010363439. The cubic root of 156870641 is about 539.3208666362.

The spelling of 156870641 in words is "one hundred fifty-six million, eight hundred seventy thousand, six hundred forty-one".