157421755 has 16 divisors (see below), whose sum is σ = 194158944. Its totient is φ = 122456320.

The previous prime is 157421743. The next prime is 157421767. The reversal of 157421755 is 557124751.

It is an interprime number because it is at equal distance from previous prime (157421743) and next prime (157421767).

It is not a de Polignac number, because 157421755 - 2¹¹ = 157419707 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70029 + ... + 72241.

It is an arithmetic number, because the mean of its divisors is an integer number (12134934).

Almost surely, 2^157421755 is an apocalyptic number.

157421755 is a deficient number, since it is larger than the sum of its proper divisors (36737189).

157421755 is a wasteful number, since it uses less digits than its factorization.

157421755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2606.

The product of its digits is 49000, while the sum is 37.

The square root of 157421755 is about 12546.7826553264. The cubic root of 157421755 is about 539.9517046428.

The spelling of 157421755 in words is "one hundred fifty-seven million, four hundred twenty-one thousand, seven hundred fifty-five".