7867942 has 4 divisors (see below), whose sum is σ = 11801916. Its totient is φ = 3933970.

The previous prime is 7867931. The next prime is 7867967. The reversal of 7867942 is 2497687.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2497687 = 149 ⋅16763.

It is a super-2 number, since 2×7867942² = 123809022630728, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1966984 + ... + 1966987.

It is an arithmetic number, because the mean of its divisors is an integer number (2950479).

Almost surely, 2^7867942 is an apocalyptic number.

7867942 is a deficient number, since it is larger than the sum of its proper divisors (3933974).

7867942 is a wasteful number, since it uses less digits than its factorization.

7867942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3933973.

The product of its digits is 169344, while the sum is 43.

The square root of 7867942 is about 2804.9852049521. The cubic root of 7867942 is about 198.8934051988.

The spelling of 7867942 in words is "seven million, eight hundred sixty-seven thousand, nine hundred forty-two".