6557256 has 48 divisors (see below), whose sum is σ = 18062460. Its totient is φ = 2148480.

The previous prime is 6557233. The next prime is 6557279. The reversal of 6557256 is 6527556.

It is an interprime number because it is at equal distance from previous prime (6557233) and next prime (6557279).

It can be written as a sum of positive squares in 2 ways, for example, as 6502500 + 54756 = 2550^2 + 234^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 6557256.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3646 + ... + 5138.

Almost surely, 2^6557256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6557256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9031230).

6557256 is an abundant number, since it is smaller than the sum of its proper divisors (11505204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6557256 is a wasteful number, since it uses less digits than its factorization.

6557256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1566 (or 1559 counting only the distinct ones).

The product of its digits is 63000, while the sum is 36.

The square root of 6557256 is about 2560.7139629408. The cubic root of 6557256 is about 187.1719276336.

The spelling of 6557256 in words is "six million, five hundred fifty-seven thousand, two hundred fifty-six".