2644625 has 8 divisors (see below), whose sum is σ = 3300648. Its totient is φ = 2115600.

The previous prime is 2644619. The next prime is 2644627. The reversal of 2644625 is 5264462.

It can be written as a sum of positive squares in 4 ways, for example, as 659344 + 1985281 = 812^2 + 1409^2 .

It is not a de Polignac number, because 2644625 - 2⁶ = 2644561 is a prime.

It is a d-powerful number, because it can be written as 2¹¹ + 6³ + 4 + 4⁹ + 6⁷ + 2²¹ + 5⁵ .

It is a Duffinian number.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (2644627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10454 + ... + 10703.

It is an arithmetic number, because the mean of its divisors is an integer number (412581).

2^2644625 is an apocalyptic number.

2644625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2644625 is a deficient number, since it is larger than the sum of its proper divisors (656023).

2644625 is an equidigital number, since it uses as much as digits as its factorization.

2644625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21172 (or 21162 counting only the distinct ones).

The product of its digits is 11520, while the sum is 29.

The square root of 2644625 is about 1626.2303034933. The cubic root of 2644625 is about 138.2891263721.

The spelling of 2644625 in words is "two million, six hundred forty-four thousand, six hundred twenty-five".