2456561 has 12 divisors (see below), whose sum is σ = 2675712. Its totient is φ = 2250864.

The previous prime is 2456557. The next prime is 2456569. The reversal of 2456561 is 1656542.

It is not a de Polignac number, because 2456561 - 2² = 2456557 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2456569) 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, 19280 + ... + 19406.

It is an arithmetic number, because the mean of its divisors is an integer number (222976).

2^2456561 is an apocalyptic number.

It is an amenable number.

2456561 is a deficient number, since it is larger than the sum of its proper divisors (219151).

2456561 is a wasteful number, since it uses less digits than its factorization.

2456561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208 (or 179 counting only the distinct ones).

The product of its digits is 7200, while the sum is 29.

The square root of 2456561 is about 1567.3420175571. The cubic root of 2456561 is about 134.9302062646.

The spelling of 2456561 in words is "two million, four hundred fifty-six thousand, five hundred sixty-one".