7285621 has 4 divisors (see below), whose sum is σ = 8326432. Its totient is φ = 6244812.

The previous prime is 7285613. The next prime is 7285631. The reversal of 7285621 is 1265827.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 7285621 - 2³ = 7285613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7285601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 520395 + ... + 520408.

It is an arithmetic number, because the mean of its divisors is an integer number (2081608).

Almost surely, 2^7285621 is an apocalyptic number.

It is an amenable number.

7285621 is a deficient number, since it is larger than the sum of its proper divisors (1040811).

7285621 is a wasteful number, since it uses less digits than its factorization.

7285621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040810.

The product of its digits is 6720, while the sum is 31.

The square root of 7285621 is about 2699.1889522595. The cubic root of 7285621 is about 193.8602901722.

The spelling of 7285621 in words is "seven million, two hundred eighty-five thousand, six hundred twenty-one".