7239981 has 16 divisors (see below), whose sum is σ = 11078144. Its totient is φ = 4119984.

The previous prime is 7239979. The next prime is 7240001. The reversal of 7239981 is 1899327.

It is not a de Polignac number, because 7239981 - 2¹ = 7239979 is a prime.

It is a super-2 number, since 2×7239981² = 104834649760722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7239961) 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, 5886 + ... + 7008.

It is an arithmetic number, because the mean of its divisors is an integer number (692384).

Almost surely, 2^7239981 is an apocalyptic number.

It is an amenable number.

7239981 is a deficient number, since it is larger than the sum of its proper divisors (3838163).

7239981 is a wasteful number, since it uses less digits than its factorization.

7239981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1440.

The product of its digits is 27216, while the sum is 39.

The square root of 7239981 is about 2690.7212787652. The cubic root of 7239981 is about 193.4546361886.

The spelling of 7239981 in words is "seven million, two hundred thirty-nine thousand, nine hundred eighty-one".