2600681 has 2 divisors, whose sum is σ = 2600682. Its totient is φ = 2600680.

The previous prime is 2600627. The next prime is 2600687. The reversal of 2600681 is 1860062.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2088025 + 512656 = 1445^2 + 716^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2600681 is a prime.

It is a super-2 number, since 2×2600681² = 13527083327522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2600687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1300340 + 1300341.

It is an arithmetic number, because the mean of its divisors is an integer number (1300341).

2^2600681 is an apocalyptic number.

It is an amenable number.

2600681 is a deficient number, since it is larger than the sum of its proper divisors (1).

2600681 is an equidigital number, since it uses as much as digits as its factorization.

2600681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 2600681 is about 1612.6627049696. The cubic root of 2600681 is about 137.5188910684.

The spelling of 2600681 in words is "two million, six hundred thousand, six hundred eighty-one".