157241391 has 4 divisors (see below), whose sum is σ = 209655192. Its totient is φ = 104827592.

The previous prime is 157241389. The next prime is 157241401. The reversal of 157241391 is 193142751.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 157241391 - 2¹ = 157241389 is a prime.

It is a super-2 number, since 2×157241391² = 49449710087229762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157241351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26206896 + ... + 26206901.

It is an arithmetic number, because the mean of its divisors is an integer number (52413798).

Almost surely, 2^157241391 is an apocalyptic number.

157241391 is a deficient number, since it is larger than the sum of its proper divisors (52413801).

157241391 is an equidigital number, since it uses as much as digits as its factorization.

157241391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52413800.

The product of its digits is 7560, while the sum is 33.

The square root of 157241391 is about 12539.5929359768. The cubic root of 157241391 is about 539.7454115406.

The spelling of 157241391 in words is "one hundred fifty-seven million, two hundred forty-one thousand, three hundred ninety-one".