2624665 has 4 divisors (see below), whose sum is σ = 3149604. Its totient is φ = 2099728.

The previous prime is 2624663. The next prime is 2624693. The reversal of 2624665 is 5664262.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5664262 = 2 ⋅2832131.

It can be written as a sum of positive squares in 2 ways, for example, as 1792921 + 831744 = 1339^2 + 912^2 .

It is a cyclic number.

It is not a de Polignac number, because 2624665 - 2¹ = 2624663 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.

2624665 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2624663) 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, 262462 + ... + 262471.

It is an arithmetic number, because the mean of its divisors is an integer number (787401).

2^2624665 is an apocalyptic number.

It is an amenable number.

2624665 is a deficient number, since it is larger than the sum of its proper divisors (524939).

2624665 is an equidigital number, since it uses as much as digits as its factorization.

2624665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524938.

The product of its digits is 17280, while the sum is 31.

The square root of 2624665 is about 1620.0817880589. The cubic root of 2624665 is about 137.9403403815.

The spelling of 2624665 in words is "two million, six hundred twenty-four thousand, six hundred sixty-five".