156245491 has 2 divisors, whose sum is σ = 156245492. Its totient is φ = 156245490.

The previous prime is 156245429. The next prime is 156245497. The reversal of 156245491 is 194542651.

156245491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 156245491 - 2¹¹ = 156243443 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 156245491.

It is not a weakly prime, because it can be changed into another prime (156245497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78122745 + 78122746.

It is an arithmetic number, because the mean of its divisors is an integer number (78122746).

Almost surely, 2^156245491 is an apocalyptic number.

156245491 is a deficient number, since it is larger than the sum of its proper divisors (1).

156245491 is an equidigital number, since it uses as much as digits as its factorization.

156245491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43200, while the sum is 37.

The square root of 156245491 is about 12499.8196386988. The cubic root of 156245491 is about 538.6034914736.

It can be divided in two parts, 15624 and 5491, that added together give a triangular number (21115 = T₂₀₅).

The spelling of 156245491 in words is "one hundred fifty-six million, two hundred forty-five thousand, four hundred ninety-one".