7975017421 has 12 divisors (see below), whose sum is σ = 9619256352. Its totient is φ = 6475951944.

The previous prime is 7975017409. The next prime is 7975017467. The reversal of 7975017421 is 1247105797.

It is not a de Polignac number, because 7975017421 - 2⁵ = 7975017389 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 (7975017121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1575435 + ... + 1580488.

It is an arithmetic number, because the mean of its divisors is an integer number (801604696).

Almost surely, 2^7975017421 is an apocalyptic number.

It is an amenable number.

7975017421 is a deficient number, since it is larger than the sum of its proper divisors (1644238931).

7975017421 is a wasteful number, since it uses less digits than its factorization.

7975017421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3155968 (or 3155949 counting only the distinct ones).

The product of its (nonzero) digits is 123480, while the sum is 43.

The square root of 7975017421 is about 89302.9530362798. The cubic root of 7975017421 is about 1997.9159475336.

The spelling of 7975017421 in words is "seven billion, nine hundred seventy-five million, seventeen thousand, four hundred twenty-one".