7956421 has 8 divisors (see below), whose sum is σ = 9136800. Its totient is φ = 6852240.

The previous prime is 7956409. The next prime is 7956427. The reversal of 7956421 is 1246597.

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

It is a cyclic number.

It is not a de Polignac number, because 7956421 - 2⁷ = 7956293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7956427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18826 + ... + 19243.

It is an arithmetic number, because the mean of its divisors is an integer number (1142100).

Almost surely, 2^7956421 is an apocalyptic number.

It is an amenable number.

7956421 is a deficient number, since it is larger than the sum of its proper divisors (1180379).

7956421 is a wasteful number, since it uses less digits than its factorization.

7956421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38099.

The product of its digits is 15120, while the sum is 34.

The square root of 7956421 is about 2820.7128531632. The cubic root of 7956421 is about 199.6361802439.

The spelling of 7956421 in words is "seven million, nine hundred fifty-six thousand, four hundred twenty-one".