2553645 has 8 divisors (see below), whose sum is σ = 4085856. Its totient is φ = 1361936.

The previous prime is 2553637. The next prime is 2553647. The reversal of 2553645 is 5463552.

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

It is a cyclic number.

It is not a de Polignac number, because 2553645 - 2³ = 2553637 is a prime.

It is a super-3 number, since 3×2553645³ = 49957744572056433375, which contains 333 as substring. Note that it is a super-d number also for d = 2.

2553645 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2553647) 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, 85107 + ... + 85136.

It is an arithmetic number, because the mean of its divisors is an integer number (510732).

2^2553645 is an apocalyptic number.

It is an amenable number.

2553645 is a deficient number, since it is larger than the sum of its proper divisors (1532211).

2553645 is a wasteful number, since it uses less digits than its factorization.

2553645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170251.

The product of its digits is 18000, while the sum is 30.

The square root of 2553645 is about 1598.0128284842. The cubic root of 2553645 is about 136.6847850921.

The spelling of 2553645 in words is "two million, five hundred fifty-three thousand, six hundred forty-five".