2624561 has 2 divisors, whose sum is σ = 2624562. Its totient is φ = 2624560.

The previous prime is 2624549. The next prime is 2624563. The reversal of 2624561 is 1654262.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1336336 + 1288225 = 1156^2 + 1135^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2624561 is a prime.

Together with 2624563, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2624561.

It is not a weakly prime, because it can be changed into another prime (2624563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1312280 + 1312281.

It is an arithmetic number, because the mean of its divisors is an integer number (1312281).

2^2624561 is an apocalyptic number.

It is an amenable number.

2624561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2624561 is an equidigital number, since it uses as much as digits as its factorization.

2624561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 26.

The square root of 2624561 is about 1620.0496905959. The cubic root of 2624561 is about 137.9385184366.

Subtracting from 2624561 its reverse (1654262), we obtain a cube (970299 = 99³).

The spelling of 2624561 in words is "two million, six hundred twenty-four thousand, five hundred sixty-one".