74242405 has 16 divisors (see below), whose sum is σ = 94279680. Its totient is φ = 55968192.

The previous prime is 74242403. The next prime is 74242409. The reversal of 74242405 is 50424247.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 74242405 - 2¹ = 74242403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74242403) 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, 16732 + ... + 20698.

It is an arithmetic number, because the mean of its divisors is an integer number (5892480).

Almost surely, 2^74242405 is an apocalyptic number.

It is an amenable number.

74242405 is a deficient number, since it is larger than the sum of its proper divisors (20037275).

74242405 is a wasteful number, since it uses less digits than its factorization.

74242405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4188.

The product of its (nonzero) digits is 8960, while the sum is 28.

The square root of 74242405 is about 8616.4032519376. The cubic root of 74242405 is about 420.2915681408.

It can be divided in two parts, 74242 and 405, that added together give a palindrome (74647).

The spelling of 74242405 in words is "seventy-four million, two hundred forty-two thousand, four hundred five".