2645431 has 2 divisors, whose sum is σ = 2645432. Its totient is φ = 2645430.

The previous prime is 2645429. The next prime is 2645453. The reversal of 2645431 is 1345462.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2645431 - 2¹ = 2645429 is a prime.

It is a super-2 number, since 2×2645431² = 13996610351522, which contains 22 as substring.

Together with 2645429, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 2645396 and 2645405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2645131) 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, 1322715 + 1322716.

It is an arithmetic number, because the mean of its divisors is an integer number (1322716).

2^2645431 is an apocalyptic number.

2645431 is a deficient number, since it is larger than the sum of its proper divisors (1).

2645431 is an equidigital number, since it uses as much as digits as its factorization.

2645431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 25.

The square root of 2645431 is about 1626.4780969936. The cubic root of 2645431 is about 138.3031736963.

The spelling of 2645431 in words is "two million, six hundred forty-five thousand, four hundred thirty-one".