2656501 has 2 divisors, whose sum is σ = 2656502. Its totient is φ = 2656500.

The previous prime is 2656499. The next prime is 2656529. The reversal of 2656501 is 1056562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2640625 + 15876 = 1625^2 + 126^2 .

It is a cyclic number.

It is not a de Polignac number, because 2656501 - 2¹ = 2656499 is a prime.

Together with 2656499, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2656601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1328250 + 1328251.

It is an arithmetic number, because the mean of its divisors is an integer number (1328251).

2^2656501 is an apocalyptic number.

It is an amenable number.

2656501 is a deficient number, since it is larger than the sum of its proper divisors (1).

2656501 is an equidigital number, since it uses as much as digits as its factorization.

2656501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 2656501 is about 1629.8776027665. The cubic root of 2656501 is about 138.4958184908.

The spelling of 2656501 in words is "two million, six hundred fifty-six thousand, five hundred one".