157241251 has 2 divisors, whose sum is σ = 157241252. Its totient is φ = 157241250.

The previous prime is 157241237. The next prime is 157241281. The reversal of 157241251 is 152142751.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 157241251 - 2²³ = 148852643 is a prime.

It is a super-2 number, since 2×157241251² = 49449622032090002, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (157241281) 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, 78620625 + 78620626.

It is an arithmetic number, because the mean of its divisors is an integer number (78620626).

Almost surely, 2^157241251 is an apocalyptic number.

157241251 is a deficient number, since it is larger than the sum of its proper divisors (1).

157241251 is an equidigital number, since it uses as much as digits as its factorization.

157241251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2800, while the sum is 28.

The square root of 157241251 is about 12539.5873536572. The cubic root of 157241251 is about 539.7452513530.

The spelling of 157241251 in words is "one hundred fifty-seven million, two hundred forty-one thousand, two hundred fifty-one".