157452681 has 8 divisors (see below), whose sum is σ = 211025440. Its totient is φ = 104424192.

The previous prime is 157452671. The next prime is 157452697. The reversal of 157452681 is 186254751.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 157452681 - 2⁷ = 157452553 is a prime.

It is a super-2 number, since 2×157452681² = 49582693508175522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157452611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135391 + ... + 136548.

It is an arithmetic number, because the mean of its divisors is an integer number (26378180).

Almost surely, 2^157452681 is an apocalyptic number.

It is an amenable number.

157452681 is a deficient number, since it is larger than the sum of its proper divisors (53572759).

157452681 is a wasteful number, since it uses less digits than its factorization.

157452681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272135.

The product of its digits is 67200, while the sum is 39.

The square root of 157452681 is about 12548.0150223053. The cubic root of 157452681 is about 539.9870607325.

The spelling of 157452681 in words is "one hundred fifty-seven million, four hundred fifty-two thousand, six hundred eighty-one".