2856431 has 2 divisors, whose sum is σ = 2856432. Its totient is φ = 2856430.

The previous prime is 2856421. The next prime is 2856449. The reversal of 2856431 is 1346582.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2856431 is a prime.

It is a super-2 number, since 2×2856431² = 16318396115522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2856394 and 2856403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2856421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1428215 + 1428216.

It is an arithmetic number, because the mean of its divisors is an integer number (1428216).

2^2856431 is an apocalyptic number.

2856431 is a deficient number, since it is larger than the sum of its proper divisors (1).

2856431 is an equidigital number, since it uses as much as digits as its factorization.

2856431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 29.

The square root of 2856431 is about 1690.0979261569. The cubic root of 2856431 is about 141.8865555610.

The spelling of 2856431 in words is "two million, eight hundred fifty-six thousand, four hundred thirty-one".