2535561 has 24 divisors (see below), whose sum is σ = 4228224. Its totient is φ = 1434240.

The previous prime is 2535553. The next prime is 2535571. The reversal of 2535561 is 1655352.

It is not a de Polignac number, because 2535561 - 2³ = 2535553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2535541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10401 + ... + 10641.

It is an arithmetic number, because the mean of its divisors is an integer number (176176).

2^2535561 is an apocalyptic number.

2535561 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2535561 is a deficient number, since it is larger than the sum of its proper divisors (1692663).

2535561 is a wasteful number, since it uses less digits than its factorization.

2535561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421 (or 418 counting only the distinct ones).

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

The square root of 2535561 is about 1592.3444979024. The cubic root of 2535561 is about 136.3613695381.

The spelling of 2535561 in words is "two million, five hundred thirty-five thousand, five hundred sixty-one".