6312521 has 2 divisors, whose sum is σ = 6312522. Its totient is φ = 6312520.

The previous prime is 6312431. The next prime is 6312547. The reversal of 6312521 is 1252136.

6312521 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5456896 + 855625 = 2336^2 + 925^2 .

It is a cyclic number.

It is not a de Polignac number, because 6312521 - 2¹⁸ = 6050377 is a prime.

It is a Sophie Germain prime.

It is an Ulam number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6312493 and 6312502.

It is not a weakly prime, because it can be changed into another prime (6312571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3156260 + 3156261.

It is an arithmetic number, because the mean of its divisors is an integer number (3156261).

Almost surely, 2^6312521 is an apocalyptic number.

It is an amenable number.

6312521 is a deficient number, since it is larger than the sum of its proper divisors (1).

6312521 is an equidigital number, since it uses as much as digits as its factorization.

6312521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 360, while the sum is 20.

The square root of 6312521 is about 2512.4730844329. The cubic root of 6312521 is about 184.8137497344.

Adding to 6312521 its reverse (1252136), we get a palindrome (7564657).

The spelling of 6312521 in words is "six million, three hundred twelve thousand, five hundred twenty-one".