7921425 has 12 divisors (see below), whose sum is σ = 13096880. Its totient is φ = 4224720.

The previous prime is 7921411. The next prime is 7921447. The reversal of 7921425 is 5241297.

It is not a de Polignac number, because 7921425 - 2⁸ = 7921169 is a prime.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 7921392 and 7921401.

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 in 11 ways as a sum of consecutive naturals, for example, 52735 + ... + 52884.

Almost surely, 2^7921425 is an apocalyptic number.

7921425 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

7921425 is a deficient number, since it is larger than the sum of its proper divisors (5175455).

7921425 is a wasteful number, since it uses less digits than its factorization.

7921425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105632 (or 105627 counting only the distinct ones).

The product of its digits is 5040, while the sum is 30.

The square root of 7921425 is about 2814.5026203576. The cubic root of 7921425 is about 199.3430527979.

The spelling of 7921425 in words is "seven million, nine hundred twenty-one thousand, four hundred twenty-five".