7407981 has 24 divisors (see below), whose sum is σ = 12442560. Its totient is φ = 4159296.

The previous prime is 7407979. The next prime is 7408007. The reversal of 7407981 is 1897047.

It is not a de Polignac number, because 7407981 - 2¹ = 7407979 is a prime.

It is a super-2 number, since 2×7407981² = 109756364992722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7407181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2721 + ... + 4713.

It is an arithmetic number, because the mean of its divisors is an integer number (518440).

Almost surely, 2^7407981 is an apocalyptic number.

It is an amenable number.

7407981 is a deficient number, since it is larger than the sum of its proper divisors (5034579).

7407981 is a wasteful number, since it uses less digits than its factorization.

7407981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2065 (or 2062 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 7407981 is about 2721.7606434071. The cubic root of 7407981 is about 194.9395473357.

The spelling of 7407981 in words is "seven million, four hundred seven thousand, nine hundred eighty-one".