2555987 has 6 divisors (see below), whose sum is σ = 2973348. Its totient is φ = 2190804.

The previous prime is 2555957. The next prime is 2555989. The reversal of 2555987 is 7895552.

It is not a de Polignac number, because 2555987 - 2⁸ = 2555731 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2¹⁸ + 5² + 5⁷ + 5⁹ + 9² + 8⁶ + 7³ .

It is not an unprimeable number, because it can be changed into a prime (2555989) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26033 + ... + 26130.

It is an arithmetic number, because the mean of its divisors is an integer number (495558).

2^2555987 is an apocalyptic number.

2555987 is a deficient number, since it is larger than the sum of its proper divisors (417361).

2555987 is an equidigital number, since it uses as much as digits as its factorization.

2555987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52177 (or 52170 counting only the distinct ones).

The product of its digits is 126000, while the sum is 41.

The square root of 2555987 is about 1598.7454456542. The cubic root of 2555987 is about 136.7265577941.

The spelling of 2555987 in words is "two million, five hundred fifty-five thousand, nine hundred eighty-seven".