2553561 has 12 divisors (see below), whose sum is σ = 3714880. Its totient is φ = 1690200.

The previous prime is 2553559. The next prime is 2553599. The reversal of 2553561 is 1653552.

It is not a de Polignac number, because 2553561 - 2¹ = 2553559 is a prime.

It is a Duffinian number.

2553561 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2553511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 420 + ... + 2298.

2^2553561 is an apocalyptic number.

It is an amenable number.

2553561 is a deficient number, since it is larger than the sum of its proper divisors (1161319).

2553561 is a wasteful number, since it uses less digits than its factorization.

2553561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2036 (or 2033 counting only the distinct ones).

The product of its digits is 4500, while the sum is 27.

The square root of 2553561 is about 1597.9865456255. The cubic root of 2553561 is about 136.6832863654.

Subtracting from 2553561 its reverse (1653552), we obtain a palindrome (900009).

The spelling of 2553561 in words is "two million, five hundred fifty-three thousand, five hundred sixty-one".