79240421 has 16 divisors (see below), whose sum is σ = 88303488. Its totient is φ = 70632000.

The previous prime is 79240409. The next prime is 79240429. The reversal of 79240421 is 12404297.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79240421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79240429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72086 + ... + 73176.

It is an arithmetic number, because the mean of its divisors is an integer number (5518968).

Almost surely, 2^79240421 is an apocalyptic number.

It is an amenable number.

79240421 is a deficient number, since it is larger than the sum of its proper divisors (9063067).

79240421 is a wasteful number, since it uses less digits than its factorization.

79240421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1292.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 79240421 is about 8901.7088808835. The cubic root of 79240421 is about 429.5188795858.

The spelling of 79240421 in words is "seventy-nine million, two hundred forty thousand, four hundred twenty-one".