2455561 has 2 divisors, whose sum is σ = 2455562. Its totient is φ = 2455560.

The previous prime is 2455553. The next prime is 2455577. The reversal of 2455561 is 1655542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2310400 + 145161 = 1520^2 + 381^2 .

It is a cyclic number.

It is not a de Polignac number, because 2455561 - 2³ = 2455553 is a prime.

It is not a weakly prime, because it can be changed into another prime (2455511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1227780 + 1227781.

It is an arithmetic number, because the mean of its divisors is an integer number (1227781).

2^2455561 is an apocalyptic number.

It is an amenable number.

2455561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2455561 is an equidigital number, since it uses as much as digits as its factorization.

2455561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6000, while the sum is 28.

The square root of 2455561 is about 1567.0229736669. The cubic root of 2455561 is about 134.9118949588.

The spelling of 2455561 in words is "two million, four hundred fifty-five thousand, five hundred sixty-one".