7920642 has 8 divisors (see below), whose sum is σ = 15841296. Its totient is φ = 2640212.

The previous prime is 7920641. The next prime is 7920677. The reversal of 7920642 is 2460297.

It is a happy number.

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

7920642 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (7920641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 660048 + ... + 660059.

It is an arithmetic number, because the mean of its divisors is an integer number (1980162).

Almost surely, 2^7920642 is an apocalyptic number.

7920642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7920642 is a wasteful number, since it uses less digits than its factorization.

7920642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320112.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 7920642 is about 2814.3635159659. The cubic root of 7920642 is about 199.3364845036.

The spelling of 7920642 in words is "seven million, nine hundred twenty thousand, six hundred forty-two".