2563601 has 2 divisors, whose sum is σ = 2563602. Its totient is φ = 2563600.

The previous prime is 2563553. The next prime is 2563633. The reversal of 2563601 is 1063652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2563201 + 400 = 1601^2 + 20^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2563601 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2563661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1281800 + 1281801.

It is an arithmetic number, because the mean of its divisors is an integer number (1281801).

2^2563601 is an apocalyptic number.

It is an amenable number.

2563601 is a deficient number, since it is larger than the sum of its proper divisors (1).

2563601 is an equidigital number, since it uses as much as digits as its factorization.

2563601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 2563601 is about 1601.1249170505. The cubic root of 2563601 is about 136.8621875930.

The spelling of 2563601 in words is "two million, five hundred sixty-three thousand, six hundred one".