7225981 has 8 divisors (see below), whose sum is σ = 8427200. Its totient is φ = 6193404.

The previous prime is 7225973. The next prime is 7225987. The reversal of 7225981 is 1895227.

It is not a de Polignac number, because 7225981 - 2³ = 7225973 is a prime.

It is a super-2 number, since 2×7225981² = 104429602824722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7225987) 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 7 ways as a sum of consecutive naturals, for example, 10191 + ... + 10876.

It is an arithmetic number, because the mean of its divisors is an integer number (1053400).

Almost surely, 2^7225981 is an apocalyptic number.

It is an amenable number.

7225981 is a deficient number, since it is larger than the sum of its proper divisors (1201219).

7225981 is an equidigital number, since it uses as much as digits as its factorization.

7225981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21088 (or 21074 counting only the distinct ones).

The product of its digits is 10080, while the sum is 34.

The square root of 7225981 is about 2688.1184869719. The cubic root of 7225981 is about 193.3298608836.

The spelling of 7225981 in words is "seven million, two hundred twenty-five thousand, nine hundred eighty-one".