3122731 has 2 divisors, whose sum is σ = 3122732. Its totient is φ = 3122730.

The previous prime is 3122729. The next prime is 3122737. The reversal of 3122731 is 1372213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3122731 - 2¹ = 3122729 is a prime.

It is a super-2 number, since 2×3122731² = 19502897796722, which contains 22 as substring.

Together with 3122729, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 3122699 and 3122708.

It is not a weakly prime, because it can be changed into another prime (3122737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1561365 + 1561366.

It is an arithmetic number, because the mean of its divisors is an integer number (1561366).

Almost surely, 2^3122731 is an apocalyptic number.

3122731 is a deficient number, since it is larger than the sum of its proper divisors (1).

3122731 is an equidigital number, since it uses as much as digits as its factorization.

3122731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 252, while the sum is 19.

The square root of 3122731 is about 1767.1250663153. The cubic root of 3122731 is about 146.1654938299.

Adding to 3122731 its reverse (1372213), we get a palindrome (4494944).

The spelling of 3122731 in words is "three million, one hundred twenty-two thousand, seven hundred thirty-one".