7975421 has 8 divisors (see below), whose sum is σ = 8474400. Its totient is φ = 7484400.

The previous prime is 7975417. The next prime is 7975423. The reversal of 7975421 is 1245797.

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 7975421 - 2² = 7975417 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 (7975423) 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, 146 + ... + 3996.

It is an arithmetic number, because the mean of its divisors is an integer number (1059300).

Almost surely, 2^7975421 is an apocalyptic number.

It is an amenable number.

7975421 is a deficient number, since it is larger than the sum of its proper divisors (498979).

7975421 is a wasteful number, since it uses less digits than its factorization.

7975421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3979.

The product of its digits is 17640, while the sum is 35.

The square root of 7975421 is about 2824.0787878528. The cubic root of 7975421 is about 199.7949648748.

The spelling of 7975421 in words is "seven million, nine hundred seventy-five thousand, four hundred twenty-one".