2644261 has 2 divisors, whose sum is σ = 2644262. Its totient is φ = 2644260.

The previous prime is 2644247. The next prime is 2644277. The reversal of 2644261 is 1624462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2579236 + 65025 = 1606^2 + 255^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2644261 is a prime.

It is a super-2 number, since 2×2644261² = 13984232472242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2644561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1322130 + 1322131.

It is an arithmetic number, because the mean of its divisors is an integer number (1322131).

2^2644261 is an apocalyptic number.

It is an amenable number.

2644261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2644261 is an equidigital number, since it uses as much as digits as its factorization.

2644261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 25.

The square root of 2644261 is about 1626.1183843743. The cubic root of 2644261 is about 138.2827814837.

The spelling of 2644261 in words is "two million, six hundred forty-four thousand, two hundred sixty-one".