7965421 has 2 divisors, whose sum is σ = 7965422. Its totient is φ = 7965420.

The previous prime is 7965409. The next prime is 7965457. The reversal of 7965421 is 1245697.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6786025 + 1179396 = 2605^2 + 1086^2 .

It is a cyclic number.

It is not a de Polignac number, because 7965421 - 2⁹ = 7964909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7965721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3982710 + 3982711.

It is an arithmetic number, because the mean of its divisors is an integer number (3982711).

Almost surely, 2^7965421 is an apocalyptic number.

It is an amenable number.

7965421 is a deficient number, since it is larger than the sum of its proper divisors (1).

7965421 is an equidigital number, since it uses as much as digits as its factorization.

7965421 is an evil number, because the sum of its binary digits is even.

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

The square root of 7965421 is about 2822.3077436736. The cubic root of 7965421 is about 199.7114254907.

The spelling of 7965421 in words is "seven million, nine hundred sixty-five thousand, four hundred twenty-one".