2555506 has 4 divisors (see below), whose sum is σ = 3833262. Its totient is φ = 1277752.

The previous prime is 2555477. The next prime is 2555521. The reversal of 2555506 is 6055552.

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

It can be written as a sum of positive squares in only one way, i.e., 1729225 + 826281 = 1315^2 + 909^2 .

It is a super-2 number, since 2×2555506² = 13061221832072, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638875 + ... + 638878.

2^2555506 is an apocalyptic number.

2555506 is a deficient number, since it is larger than the sum of its proper divisors (1277756).

2555506 is a wasteful number, since it uses less digits than its factorization.

2555506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1277755.

The product of its (nonzero) digits is 7500, while the sum is 28.

The square root of 2555506 is about 1598.5950081243. The cubic root of 2555506 is about 136.7179805987.

The spelling of 2555506 in words is "two million, five hundred fifty-five thousand, five hundred six".