157421679 has 8 divisors (see below), whose sum is σ = 209962032. Its totient is φ = 104914560.

The previous prime is 157421647. The next prime is 157421681. The reversal of 157421679 is 976124751.

It is a happy number.

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

It is not a de Polignac number, because 157421679 - 2⁵ = 157421647 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 157421679.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157421609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6537 + ... + 18909.

It is an arithmetic number, because the mean of its divisors is an integer number (26245254).

Almost surely, 2^157421679 is an apocalyptic number.

157421679 is a deficient number, since it is larger than the sum of its proper divisors (52540353).

157421679 is a wasteful number, since it uses less digits than its factorization.

157421679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16617.

The product of its digits is 105840, while the sum is 42.

The square root of 157421679 is about 12546.7796266612. The cubic root of 157421679 is about 539.9516177503.

The spelling of 157421679 in words is "one hundred fifty-seven million, four hundred twenty-one thousand, six hundred seventy-nine".