7421864 has 16 divisors (see below), whose sum is σ = 14212800. Its totient is φ = 3631792.

The previous prime is 7421863. The next prime is 7421891. The reversal of 7421864 is 4681247.

It is a self number, because there is not a number n which added to its sum of digits gives 7421864.

It is not an unprimeable number, because it can be changed into a prime (7421863) 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, 9494 + ... + 10245.

It is an arithmetic number, because the mean of its divisors is an integer number (888300).

Almost surely, 2^7421864 is an apocalyptic number.

It is an amenable number.

7421864 is a deficient number, since it is larger than the sum of its proper divisors (6790936).

7421864 is a wasteful number, since it uses less digits than its factorization.

7421864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19792 (or 19788 counting only the distinct ones).

The product of its digits is 10752, while the sum is 32.

The square root of 7421864 is about 2724.3098208537. The cubic root of 7421864 is about 195.0612474713.

The spelling of 7421864 in words is "seven million, four hundred twenty-one thousand, eight hundred sixty-four".