2563261 has 2 divisors, whose sum is σ = 2563262. Its totient is φ = 2563260.

The previous prime is 2563237. The next prime is 2563291. The reversal of 2563261 is 1623652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1907161 + 656100 = 1381^2 + 810^2 .

It is a cyclic number.

It is not a de Polignac number, because 2563261 - 2⁵ = 2563229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2563291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1281630 + 1281631.

It is an arithmetic number, because the mean of its divisors is an integer number (1281631).

2^2563261 is an apocalyptic number.

It is an amenable number.

2563261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2563261 is an equidigital number, since it uses as much as digits as its factorization.

2563261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 25.

The square root of 2563261 is about 1601.0187381789. The cubic root of 2563261 is about 136.8561368333.

The spelling of 2563261 in words is "two million, five hundred sixty-three thousand, two hundred sixty-one".