2630561 has 4 divisors (see below), whose sum is σ = 2721300. Its totient is φ = 2539824.

The previous prime is 2630557. The next prime is 2630587. The reversal of 2630561 is 1650362.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1918225 + 712336 = 1385^2 + 844^2 .

It is a cyclic number.

It is not a de Polignac number, because 2630561 - 2² = 2630557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2630501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45326 + ... + 45383.

It is an arithmetic number, because the mean of its divisors is an integer number (680325).

2^2630561 is an apocalyptic number.

It is an amenable number.

2630561 is a deficient number, since it is larger than the sum of its proper divisors (90739).

2630561 is an equidigital number, since it uses as much as digits as its factorization.

2630561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90738.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 2630561 is about 1621.9004285097. The cubic root of 2630561 is about 138.0435520313.

The spelling of 2630561 in words is "two million, six hundred thirty thousand, five hundred sixty-one".