3116521 has 2 divisors, whose sum is σ = 3116522. Its totient is φ = 3116520.

The previous prime is 3116507. The next prime is 3116537. The reversal of 3116521 is 1256113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3115225 + 1296 = 1765^2 + 36^2 .

It is a cyclic number.

It is not a de Polignac number, because 3116521 - 2¹¹ = 3114473 is a prime.

It is not a weakly prime, because it can be changed into another prime (3116501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1558260 + 1558261.

It is an arithmetic number, because the mean of its divisors is an integer number (1558261).

Almost surely, 2^3116521 is an apocalyptic number.

It is an amenable number.

3116521 is a deficient number, since it is larger than the sum of its proper divisors (1).

3116521 is an equidigital number, since it uses as much as digits as its factorization.

3116521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 180, while the sum is 19.

The square root of 3116521 is about 1765.3671006337. The cubic root of 3116521 is about 146.0685391587.

The spelling of 3116521 in words is "three million, one hundred sixteen thousand, five hundred twenty-one".