157256123 has 2 divisors, whose sum is σ = 157256124. Its totient is φ = 157256122.

The previous prime is 157256107. The next prime is 157256159. The reversal of 157256123 is 321652751.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 157256123 - 2⁴ = 157256107 is a prime.

It is a super-2 number, since 2×157256123² = 49458976441982258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 157256123.

It is not a weakly prime, because it can be changed into another prime (157256173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78628061 + 78628062.

It is an arithmetic number, because the mean of its divisors is an integer number (78628062).

Almost surely, 2^157256123 is an apocalyptic number.

157256123 is a deficient number, since it is larger than the sum of its proper divisors (1).

157256123 is an equidigital number, since it uses as much as digits as its factorization.

157256123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12600, while the sum is 32.

The square root of 157256123 is about 12540.1803416059. The cubic root of 157256123 is about 539.7622673253.

The spelling of 157256123 in words is "one hundred fifty-seven million, two hundred fifty-six thousand, one hundred twenty-three".