7861642 has 8 divisors (see below), whose sum is σ = 11846016. Its totient is φ = 3912972.

The previous prime is 7861613. The next prime is 7861657. The reversal of 7861642 is 2461687.

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

It is a junction number, because it is equal to n+sod(n) for n = 7861598 and 7861607.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8368 + ... + 9259.

It is an arithmetic number, because the mean of its divisors is an integer number (1480752).

Almost surely, 2^7861642 is an apocalyptic number.

7861642 is a deficient number, since it is larger than the sum of its proper divisors (3984374).

7861642 is a wasteful number, since it uses less digits than its factorization.

7861642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17852.

The product of its digits is 16128, while the sum is 34.

The square root of 7861642 is about 2803.8619794847. The cubic root of 7861642 is about 198.8403052038.

The spelling of 7861642 in words is "seven million, eight hundred sixty-one thousand, six hundred forty-two".