157421754 has 48 divisors (see below), whose sum is σ = 400353408. Its totient is φ = 43760736.

The previous prime is 157421743. The next prime is 157421767. The reversal of 157421754 is 457124751.

157421754 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 12222 + ... + 21545.

It is an arithmetic number, because the mean of its divisors is an integer number (8340696).

Almost surely, 2^157421754 is an apocalyptic number.

157421754 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

157421754 is an abundant number, since it is smaller than the sum of its proper divisors (242931654).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

157421754 is a wasteful number, since it uses less digits than its factorization.

157421754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33819 (or 33816 counting only the distinct ones).

The product of its digits is 39200, while the sum is 36.

The square root of 157421754 is about 12546.7826154756. The cubic root of 157421754 is about 539.9517034995.

The spelling of 157421754 in words is "one hundred fifty-seven million, four hundred twenty-one thousand, seven hundred fifty-four".