2533645 has 4 divisors (see below), whose sum is σ = 3040380. Its totient is φ = 2026912.

The previous prime is 2533627. The next prime is 2533651. The reversal of 2533645 is 5463352.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1285956 + 1247689 = 1134^2 + 1117^2 .

It is a cyclic number.

It is not a de Polignac number, because 2533645 - 2¹⁷ = 2402573 is a prime.

It is a super-3 number, since 3×2533645³ = 48793115192571933375, which contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 253360 + ... + 253369.

It is an arithmetic number, because the mean of its divisors is an integer number (760095).

2^2533645 is an apocalyptic number.

It is an amenable number.

2533645 is a deficient number, since it is larger than the sum of its proper divisors (506735).

2533645 is an equidigital number, since it uses as much as digits as its factorization.

2533645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506734.

The product of its digits is 10800, while the sum is 28.

The square root of 2533645 is about 1591.7427555984. The cubic root of 2533645 is about 136.3270136669.

Adding to 2533645 its reverse (5463352), we get a palindrome (7996997).

It can be divided in two parts, 25 and 33645, that added together give a triangular number (33670 = T₂₅₉).

The spelling of 2533645 in words is "two million, five hundred thirty-three thousand, six hundred forty-five".