7421913 has 12 divisors (see below), whose sum is σ = 11285040. Its totient is φ = 4687416.

The previous prime is 7421891. The next prime is 7421923. The reversal of 7421913 is 3191247.

It is not a de Polignac number, because 7421913 - 2⁶ = 7421849 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

7421913 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7421923) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21531 + ... + 21872.

It is an arithmetic number, because the mean of its divisors is an integer number (940420).

Almost surely, 2^7421913 is an apocalyptic number.

It is an amenable number.

7421913 is a deficient number, since it is larger than the sum of its proper divisors (3863127).

7421913 is a wasteful number, since it uses less digits than its factorization.

7421913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43428 (or 43425 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 7421913 is about 2724.3188139423. The cubic root of 7421913 is about 195.0616767426.

The spelling of 7421913 in words is "seven million, four hundred twenty-one thousand, nine hundred thirteen".