157490247 has 16 divisors (see below), whose sum is σ = 212472288. Its totient is φ = 103756800.

The previous prime is 157490233. The next prime is 157490257. The reversal of 157490247 is 742094751.

It is not a de Polignac number, because 157490247 - 2⁴ = 157490231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157490257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 203353 + ... + 204125.

It is an arithmetic number, because the mean of its divisors is an integer number (13279518).

Almost surely, 2^157490247 is an apocalyptic number.

157490247 is a deficient number, since it is larger than the sum of its proper divisors (54982041).

157490247 is a wasteful number, since it uses less digits than its factorization.

157490247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1490.

The product of its (nonzero) digits is 70560, while the sum is 39.

The square root of 157490247 is about 12549.5118231746. The cubic root of 157490247 is about 540.0300017625.

The spelling of 157490247 in words is "one hundred fifty-seven million, four hundred ninety thousand, two hundred forty-seven".