7981942 has 16 divisors (see below), whose sum is σ = 13087872. Its totient is φ = 3634560.

The previous prime is 7981937. The next prime is 7981949. The reversal of 7981942 is 2491897.

It is a super-2 number, since 2×7981942² = 127422796182728, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7981895 and 7981904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7981949) 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, 2733 + ... + 4840.

It is an arithmetic number, because the mean of its divisors is an integer number (817992).

Almost surely, 2^7981942 is an apocalyptic number.

7981942 is a deficient number, since it is larger than the sum of its proper divisors (5105930).

7981942 is a wasteful number, since it uses less digits than its factorization.

7981942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7623.

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

The square root of 7981942 is about 2825.2330877292. The cubic root of 7981942 is about 199.8494032983.

The spelling of 7981942 in words is "seven million, nine hundred eighty-one thousand, nine hundred forty-two".