157247492 has 6 divisors (see below), whose sum is σ = 275183118. Its totient is φ = 78623744.

The previous prime is 157247491. The next prime is 157247513. The reversal of 157247492 is 294742751.

It can be written as a sum of positive squares in only one way, i.e., 96157636 + 61089856 = 9806^2 + 7816^2 .

It is not an unprimeable number, because it can be changed into a prime (157247491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19655933 + ... + 19655940.

It is an arithmetic number, because the mean of its divisors is an integer number (45863853).

Almost surely, 2^157247492 is an apocalyptic number.

It is an amenable number.

157247492 is a deficient number, since it is larger than the sum of its proper divisors (117935626).

157247492 is a wasteful number, since it uses less digits than its factorization.

157247492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39311877 (or 39311875 counting only the distinct ones).

The product of its digits is 141120, while the sum is 41.

The square root of 157247492 is about 12539.8362030770. The cubic root of 157247492 is about 539.7523921966.

The spelling of 157247492 in words is "one hundred fifty-seven million, two hundred forty-seven thousand, four hundred ninety-two".