2555626 has 4 divisors (see below), whose sum is σ = 3833442. Its totient is φ = 1277812.

The previous prime is 2555617. The next prime is 2555629. The reversal of 2555626 is 6265552.

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., 1651225 + 904401 = 1285^2 + 951^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (2555629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638905 + ... + 638908.

2^2555626 is an apocalyptic number.

2555626 is a deficient number, since it is larger than the sum of its proper divisors (1277816).

2555626 is a wasteful number, since it uses less digits than its factorization.

2555626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1277815.

The product of its digits is 18000, while the sum is 31.

The square root of 2555626 is about 1598.6325406422. The cubic root of 2555626 is about 136.7201205403.

The spelling of 2555626 in words is "two million, five hundred fifty-five thousand, six hundred twenty-six".