3122991 has 12 divisors (see below), whose sum is σ = 4528368. Its totient is φ = 2073984.

The previous prime is 3122989. The next prime is 3122993. The reversal of 3122991 is 1992213.

It is an interprime number because it is at equal distance from previous prime (3122989) and next prime (3122993).

It is not a de Polignac number, because 3122991 - 2¹ = 3122989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3122993) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2686 + ... + 3668.

It is an arithmetic number, because the mean of its divisors is an integer number (377364).

Almost surely, 2^3122991 is an apocalyptic number.

3122991 is a deficient number, since it is larger than the sum of its proper divisors (1405377).

3122991 is a wasteful number, since it uses less digits than its factorization.

3122991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1342 (or 1339 counting only the distinct ones).

The product of its digits is 972, while the sum is 27.

The square root of 3122991 is about 1767.1986306016. The cubic root of 3122991 is about 146.1695503191.

The spelling of 3122991 in words is "three million, one hundred twenty-two thousand, nine hundred ninety-one".