157421877 has 4 divisors (see below), whose sum is σ = 209895840. Its totient is φ = 104947916.

The previous prime is 157421843. The next prime is 157421881. The reversal of 157421877 is 778124751.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 157421877 - 2¹² = 157417781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157421807) 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 3 ways as a sum of consecutive naturals, for example, 26236977 + ... + 26236982.

It is an arithmetic number, because the mean of its divisors is an integer number (52473960).

Almost surely, 2^157421877 is an apocalyptic number.

It is an amenable number.

157421877 is a deficient number, since it is larger than the sum of its proper divisors (52473963).

157421877 is an equidigital number, since it uses as much as digits as its factorization.

157421877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52473962.

The product of its digits is 109760, while the sum is 42.

The square root of 157421877 is about 12546.7875171296. The cubic root of 157421877 is about 539.9518441282.

The spelling of 157421877 in words is "one hundred fifty-seven million, four hundred twenty-one thousand, eight hundred seventy-seven".