74245420 has 12 divisors (see below), whose sum is σ = 155915424. Its totient is φ = 29698160.

The previous prime is 74245411. The next prime is 74245427. The reversal of 74245420 is 2454247.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (74245427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1856116 + ... + 1856155.

It is an arithmetic number, because the mean of its divisors is an integer number (12992952).

Almost surely, 2^74245420 is an apocalyptic number.

It is an amenable number.

74245420 is an abundant number, since it is smaller than the sum of its proper divisors (81670004).

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

74245420 is a wasteful number, since it uses less digits than its factorization.

74245420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3712280 (or 3712278 counting only the distinct ones).

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

The square root of 74245420 is about 8616.5782071539. The cubic root of 74245420 is about 420.2972574407.

Adding to 74245420 its reverse (2454247), we get a palindrome (76699667).

The spelling of 74245420 in words is "seventy-four million, two hundred forty-five thousand, four hundred twenty".