2645407 has 4 divisors (see below), whose sum is σ = 2650176. Its totient is φ = 2640640.

The previous prime is 2645399. The next prime is 2645413. The reversal of 2645407 is 7045462.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2645407 - 2³ = 2645399 is a prime.

It is a Duffinian number.

2645407 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2645417) 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 in 3 ways as a sum of consecutive naturals, for example, 1423 + ... + 2704.

It is an arithmetic number, because the mean of its divisors is an integer number (662544).

2^2645407 is an apocalyptic number.

2645407 is a deficient number, since it is larger than the sum of its proper divisors (4769).

2645407 is an equidigital number, since it uses as much as digits as its factorization.

2645407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4768.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 2645407 is about 1626.4707190724. The cubic root of 2645407 is about 138.3027554549.

It can be divided in two parts, 264 and 5407, that added together give a triangular number (5671 = T₁₀₆).

The spelling of 2645407 in words is "two million, six hundred forty-five thousand, four hundred seven".