3215257 has 2 divisors, whose sum is σ = 3215258. Its totient is φ = 3215256.

The previous prime is 3215231. The next prime is 3215273. The reversal of 3215257 is 7525123.

3215257 is digitally balanced in base 2, 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., 2247001 + 968256 = 1499^2 + 984^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3215257 is a prime.

It is not a weakly prime, because it can be changed into another prime (3215207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1607628 + 1607629.

It is an arithmetic number, because the mean of its divisors is an integer number (1607629).

Almost surely, 2^3215257 is an apocalyptic number.

It is an amenable number.

3215257 is a deficient number, since it is larger than the sum of its proper divisors (1).

3215257 is an equidigital number, since it uses as much as digits as its factorization.

3215257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2100, while the sum is 25.

The square root of 3215257 is about 1793.1137721851. The cubic root of 3215257 is about 147.5950856784.

It can be divided in two parts, 3215 and 257, that multiplied together give a triangular number (826255 = T₁₂₈₅).

The spelling of 3215257 in words is "three million, two hundred fifteen thousand, two hundred fifty-seven".