157493426 has 4 divisors (see below), whose sum is σ = 236240142. Its totient is φ = 78746712.

The previous prime is 157493417. The next prime is 157493429. The reversal of 157493426 is 624394751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 624394751 = 17 ⋅36729103.

It can be written as a sum of positive squares in only one way, i.e., 133980625 + 23512801 = 11575^2 + 4849^2 .

It is not an unprimeable number, because it can be changed into a prime (157493429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39373355 + ... + 39373358.

Almost surely, 2^157493426 is an apocalyptic number.

157493426 is a deficient number, since it is larger than the sum of its proper divisors (78746716).

157493426 is an equidigital number, since it uses as much as digits as its factorization.

157493426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78746715.

The product of its digits is 181440, while the sum is 41.

The square root of 157493426 is about 12549.6384808488. The cubic root of 157493426 is about 540.0336353077.

The spelling of 157493426 in words is "one hundred fifty-seven million, four hundred ninety-three thousand, four hundred twenty-six".