7263921 has 16 divisors (see below), whose sum is σ = 11132928. Its totient is φ = 4126800.

The previous prime is 7263917. The next prime is 7263931. The reversal of 7263921 is 1293627.

It is not a de Polignac number, because 7263921 - 2² = 7263917 is a prime.

7263921 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7263901) 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, 3106 + ... + 4916.

It is an arithmetic number, because the mean of its divisors is an integer number (695808).

Almost surely, 2^7263921 is an apocalyptic number.

It is an amenable number.

7263921 is a deficient number, since it is larger than the sum of its proper divisors (3869007).

7263921 is a wasteful number, since it uses less digits than its factorization.

7263921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2012.

The product of its digits is 4536, while the sum is 30.

The square root of 7263921 is about 2695.1662286397. The cubic root of 7263921 is about 193.6676297800.

The spelling of 7263921 in words is "seven million, two hundred sixty-three thousand, nine hundred twenty-one".