2645831 has 2 divisors, whose sum is σ = 2645832. Its totient is φ = 2645830.

The previous prime is 2645827. The next prime is 2645843. The reversal of 2645831 is 1385462.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2645831 - 2² = 2645827 is a prime.

It is a super-2 number, since 2×2645831² = 14000843361122, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2²¹ + 6³ + 4⁷ + 5³ + 8³ + 3¹² + 1 .

It is a junction number, because it is equal to n+sod(n) for n = 2645794 and 2645803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2645861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1322915 + 1322916.

It is an arithmetic number, because the mean of its divisors is an integer number (1322916).

2^2645831 is an apocalyptic number.

2645831 is a deficient number, since it is larger than the sum of its proper divisors (1).

2645831 is an equidigital number, since it uses as much as digits as its factorization.

2645831 is an evil number, because the sum of its binary digits is even.

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

The square root of 2645831 is about 1626.6010574200. The cubic root of 2645831 is about 138.3101440137.

The spelling of 2645831 in words is "two million, six hundred forty-five thousand, eight hundred thirty-one".