3172681 has 2 divisors, whose sum is σ = 3172682. Its totient is φ = 3172680.

The previous prime is 3172667. The next prime is 3172691. The reversal of 3172681 is 1862713.

3172681 = 1259² + 1260².

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1587600 + 1585081 = 1260^2 + 1259^2 .

It is a cyclic number.

It is not a de Polignac number, because 3172681 - 2⁵ = 3172649 is a prime.

It is a super-2 number, since 2×3172681² = 20131809455522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3172691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1586340 + 1586341.

It is an arithmetic number, because the mean of its divisors is an integer number (1586341).

Almost surely, 2^3172681 is an apocalyptic number.

3172681 is the 1260-th centered square number.

It is an amenable number.

3172681 is a deficient number, since it is larger than the sum of its proper divisors (1).

3172681 is an equidigital number, since it uses as much as digits as its factorization.

3172681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 28.

The square root of 3172681 is about 1781.2021221636. The cubic root of 3172681 is about 146.9407106606.

The spelling of 3172681 in words is "three million, one hundred seventy-two thousand, six hundred eighty-one".