2556601 has 4 divisors (see below), whose sum is σ = 2639104. Its totient is φ = 2474100.

The previous prime is 2556577. The next prime is 2556607. The reversal of 2556601 is 1066552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2556601 - 2⁵ = 2556569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2556607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41205 + ... + 41266.

It is an arithmetic number, because the mean of its divisors is an integer number (659776).

2^2556601 is an apocalyptic number.

It is an amenable number.

2556601 is a deficient number, since it is larger than the sum of its proper divisors (82503).

2556601 is an equidigital number, since it uses as much as digits as its factorization.

2556601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82502.

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

The square root of 2556601 is about 1598.9374596900. The cubic root of 2556601 is about 136.7375050831.

The spelling of 2556601 in words is "two million, five hundred fifty-six thousand, six hundred one".