2555491 has 4 divisors (see below), whose sum is σ = 2705832. Its totient is φ = 2405152.

The previous prime is 2555477. The next prime is 2555521. The reversal of 2555491 is 1945552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2555491 - 2⁵ = 2555459 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2555191) 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, 75145 + ... + 75178.

It is an arithmetic number, because the mean of its divisors is an integer number (676458).

2^2555491 is an apocalyptic number.

2555491 is a deficient number, since it is larger than the sum of its proper divisors (150341).

2555491 is a wasteful number, since it uses less digits than its factorization.

2555491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150340.

The product of its digits is 9000, while the sum is 31.

The square root of 2555491 is about 1598.5903164976. The cubic root of 2555491 is about 136.7177131013.

The spelling of 2555491 in words is "two million, five hundred fifty-five thousand, four hundred ninety-one".