2556538 has 8 divisors (see below), whose sum is σ = 3849300. Its totient is φ = 1273440.

The previous prime is 2556523. The next prime is 2556559. The reversal of 2556538 is 8356552.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2442969 + 113569 = 1563^2 + 337^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a d-powerful number, because it can be written as 2¹¹ + 5 + 5³ + 6⁷ + 5³ + 3¹¹ + 8⁷ .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1713 + ... + 2836.

2^2556538 is an apocalyptic number.

2556538 is a deficient number, since it is larger than the sum of its proper divisors (1292762).

2556538 is a wasteful number, since it uses less digits than its factorization.

2556538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4832.

The product of its digits is 36000, while the sum is 34.

The square root of 2556538 is about 1598.9177589857. The cubic root of 2556538 is about 136.7363819078.

The spelling of 2556538 in words is "two million, five hundred fifty-six thousand, five hundred thirty-eight".