3215761 has 2 divisors, whose sum is σ = 3215762. Its totient is φ = 3215760.

The previous prime is 3215759. The next prime is 3215777. The reversal of 3215761 is 1675123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2624400 + 591361 = 1620^2 + 769^2 .

It is a cyclic number.

It is not a de Polignac number, because 3215761 - 2¹ = 3215759 is a prime.

It is a super-2 number, since 2×3215761² = 20682237618242, which contains 22 as substring.

Together with 3215759, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3215711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1607880 + 1607881.

It is an arithmetic number, because the mean of its divisors is an integer number (1607881).

Almost surely, 2^3215761 is an apocalyptic number.

It is an amenable number.

3215761 is a deficient number, since it is larger than the sum of its proper divisors (1).

3215761 is an equidigital number, since it uses as much as digits as its factorization.

3215761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1260, while the sum is 25.

The square root of 3215761 is about 1793.2543043305. The cubic root of 3215761 is about 147.6027972482.

The spelling of 3215761 in words is "three million, two hundred fifteen thousand, seven hundred sixty-one".