7642865 has 16 divisors (see below), whose sum is σ = 9455616. Its totient is φ = 5928000.

The previous prime is 7642861. The next prime is 7642867. The reversal of 7642865 is 5682467.

It is a happy number.

It is not a de Polignac number, because 7642865 - 2² = 7642861 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7642861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39920 + ... + 40110.

It is an arithmetic number, because the mean of its divisors is an integer number (590976).

Almost surely, 2^7642865 is an apocalyptic number.

It is an amenable number.

7642865 is a deficient number, since it is larger than the sum of its proper divisors (1812751).

7642865 is a wasteful number, since it uses less digits than its factorization.

7642865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400.

The product of its digits is 80640, while the sum is 38.

The square root of 7642865 is about 2764.5732039503. The cubic root of 7642865 is about 196.9784562490.

The spelling of 7642865 in words is "seven million, six hundred forty-two thousand, eight hundred sixty-five".