7921075 has 12 divisors (see below), whose sum is σ = 9970840. Its totient is φ = 6240960.

The previous prime is 7921061. The next prime is 7921087. The reversal of 7921075 is 5701297.

7921075 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-7921075 is a prime.

7921075 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 690 + ... + 4039.

Almost surely, 2^7921075 is an apocalyptic number.

7921075 is a deficient number, since it is larger than the sum of its proper divisors (2049765).

7921075 is a wasteful number, since it uses less digits than its factorization.

7921075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4806 (or 4801 counting only the distinct ones).

The product of its (nonzero) digits is 4410, while the sum is 31.

The square root of 7921075 is about 2814.4404417219. The cubic root of 7921075 is about 199.3401168322.

The spelling of 7921075 in words is "seven million, nine hundred twenty-one thousand, seventy-five".