3191261 has 2 divisors, whose sum is σ = 3191262. Its totient is φ = 3191260.

The previous prime is 3191219. The next prime is 3191263. The reversal of 3191261 is 1621913.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2656900 + 534361 = 1630^2 + 731^2 .

It is a cyclic number.

It is not a de Polignac number, because 3191261 - 2⁶ = 3191197 is a prime.

Together with 3191263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3191263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1595630 + 1595631.

It is an arithmetic number, because the mean of its divisors is an integer number (1595631).

Almost surely, 2^3191261 is an apocalyptic number.

It is an amenable number.

3191261 is a deficient number, since it is larger than the sum of its proper divisors (1).

3191261 is an equidigital number, since it uses as much as digits as its factorization.

3191261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324, while the sum is 23.

The square root of 3191261 is about 1786.4100872980. The cubic root of 3191261 is about 147.2269928494.

The spelling of 3191261 in words is "three million, one hundred ninety-one thousand, two hundred sixty-one".