2656261 has 2 divisors, whose sum is σ = 2656262. Its totient is φ = 2656260.

The previous prime is 2656243. The next prime is 2656271. The reversal of 2656261 is 1626562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1705636 + 950625 = 1306^2 + 975^2 .

It is a cyclic number.

It is not a de Polignac number, because 2656261 - 2⁵ = 2656229 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2656211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1328130 + 1328131.

It is an arithmetic number, because the mean of its divisors is an integer number (1328131).

2^2656261 is an apocalyptic number.

It is an amenable number.

2656261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2656261 is an equidigital number, since it uses as much as digits as its factorization.

2656261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 28.

The square root of 2656261 is about 1629.8039759431. The cubic root of 2656261 is about 138.4916475911.

The spelling of 2656261 in words is "two million, six hundred fifty-six thousand, two hundred sixty-one".