7942981 has 8 divisors (see below), whose sum is σ = 8319744. Its totient is φ = 7568880.

The previous prime is 7942973. The next prime is 7942997. The reversal of 7942981 is 1892497.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7942981 - 2³ = 7942973 is a prime.

It is a super-2 number, since 2×7942981² = 126181894332722, which contains 22 as substring.

7942981 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7942481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7971 + ... + 8911.

It is an arithmetic number, because the mean of its divisors is an integer number (1039968).

Almost surely, 2^7942981 is an apocalyptic number.

It is an amenable number.

7942981 is a deficient number, since it is larger than the sum of its proper divisors (376763).

7942981 is a wasteful number, since it uses less digits than its factorization.

7942981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1331.

The product of its digits is 36288, while the sum is 40.

The square root of 7942981 is about 2818.3294697391. The cubic root of 7942981 is about 199.5237082981.

The spelling of 7942981 in words is "seven million, nine hundred forty-two thousand, nine hundred eighty-one".