2653645 has 8 divisors (see below), whose sum is σ = 3294360. Its totient is φ = 2049600.

The previous prime is 2653633. The next prime is 2653681. The reversal of 2653645 is 5463562.

It can be written as a sum of positive squares in 4 ways, for example, as 4 + 2653641 = 2^2 + 1629^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2653645 - 2⁵ = 2653613 is a prime.

It is a super-3 number, since 3×2653645³ = 56059565129478933375, which contains 333 as substring.

It is a d-powerful number, because it can be written as 2²⁰ + 6⁴ + 5² + 3¹³ + 6⁵ + 4⁵ + 5⁴ .

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 9006 + ... + 9295.

It is an arithmetic number, because the mean of its divisors is an integer number (411795).

2^2653645 is an apocalyptic number.

It is an amenable number.

2653645 is a deficient number, since it is larger than the sum of its proper divisors (640715).

2653645 is a wasteful number, since it uses less digits than its factorization.

2653645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18335.

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

The square root of 2653645 is about 1629.0012277466. The cubic root of 2653645 is about 138.4461684823.

The spelling of 2653645 in words is "two million, six hundred fifty-three thousand, six hundred forty-five".