2845561 has 2 divisors, whose sum is σ = 2845562. Its totient is φ = 2845560.

The previous prime is 2845553. The next prime is 2845571. The reversal of 2845561 is 1655482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1755625 + 1089936 = 1325^2 + 1044^2 .

It is a cyclic number.

It is not a de Polignac number, because 2845561 - 2³ = 2845553 is a prime.

It is not a weakly prime, because it can be changed into another prime (2845571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1422780 + 1422781.

It is an arithmetic number, because the mean of its divisors is an integer number (1422781).

2^2845561 is an apocalyptic number.

It is an amenable number.

2845561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2845561 is an equidigital number, since it uses as much as digits as its factorization.

2845561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9600, while the sum is 31.

The square root of 2845561 is about 1686.8790709473. The cubic root of 2845561 is about 141.7063461323.

The spelling of 2845561 in words is "two million, eight hundred forty-five thousand, five hundred sixty-one".