2645635 has 4 divisors (see below), whose sum is σ = 3174768. Its totient is φ = 2116504.

The previous prime is 2645603. The next prime is 2645639. The reversal of 2645635 is 5365462.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5365462 = 2 ⋅2682731.

It is a cyclic number.

It is not a de Polignac number, because 2645635 - 2⁵ = 2645603 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

2645635 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2645597 and 2645606.

It is not an unprimeable number, because it can be changed into a prime (2645639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 264559 + ... + 264568.

It is an arithmetic number, because the mean of its divisors is an integer number (793692).

2^2645635 is an apocalyptic number.

2645635 is a deficient number, since it is larger than the sum of its proper divisors (529133).

2645635 is an equidigital number, since it uses as much as digits as its factorization.

2645635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529132.

The product of its digits is 21600, while the sum is 31.

The square root of 2645635 is about 1626.5408079726. The cubic root of 2645635 is about 138.3067286460.

The spelling of 2645635 in words is "two million, six hundred forty-five thousand, six hundred thirty-five".