6325721 has 2 divisors, whose sum is σ = 6325722. Its totient is φ = 6325720.

The previous prime is 6325703. The next prime is 6325747. The reversal of 6325721 is 1275236.

It is an a-pointer prime, because the next prime (6325747) can be obtained adding 6325721 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5784025 + 541696 = 2405^2 + 736^2 .

It is a cyclic number.

It is not a de Polignac number, because 6325721 - 2²² = 2131417 is a prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (6325771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3162860 + 3162861.

It is an arithmetic number, because the mean of its divisors is an integer number (3162861).

Almost surely, 2^6325721 is an apocalyptic number.

It is an amenable number.

6325721 is a deficient number, since it is larger than the sum of its proper divisors (1).

6325721 is an equidigital number, since it uses as much as digits as its factorization.

6325721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 26.

The square root of 6325721 is about 2515.0986064169. The cubic root of 6325721 is about 184.9424802918.

The spelling of 6325721 in words is "six million, three hundred twenty-five thousand, seven hundred twenty-one".