7921072 has 10 divisors (see below), whose sum is σ = 15347108. Its totient is φ = 3960528.

The previous prime is 7921061. The next prime is 7921087. The reversal of 7921072 is 2701297.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 7921072.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247518 + ... + 247549.

Almost surely, 2^7921072 is an apocalyptic number.

It is an amenable number.

7921072 is a deficient number, since it is larger than the sum of its proper divisors (7426036).

7921072 is a wasteful number, since it uses less digits than its factorization.

7921072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495075 (or 495069 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 7921072 is about 2814.4399087563. The cubic root of 7921072 is about 199.3400916664.

The spelling of 7921072 in words is "seven million, nine hundred twenty-one thousand, seventy-two".