7959421 has 2 divisors, whose sum is σ = 7959422. Its totient is φ = 7959420.

The previous prime is 7959401. The next prime is 7959473. The reversal of 7959421 is 1249597.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6446521 + 1512900 = 2539^2 + 1230^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7959421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7959401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3979710 + 3979711.

It is an arithmetic number, because the mean of its divisors is an integer number (3979711).

Almost surely, 2^7959421 is an apocalyptic number.

It is an amenable number.

7959421 is a deficient number, since it is larger than the sum of its proper divisors (1).

7959421 is an equidigital number, since it uses as much as digits as its factorization.

7959421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 37.

The square root of 7959421 is about 2821.2445835127. The cubic root of 7959421 is about 199.6612682947.

The spelling of 7959421 in words is "seven million, nine hundred fifty-nine thousand, four hundred twenty-one".