2556437 has 8 divisors (see below), whose sum is σ = 2848440. Its totient is φ = 2278080.

The previous prime is 2556419. The next prime is 2556451. The reversal of 2556437 is 7346552.

It can be written as a sum of positive squares in 4 ways, for example, as 78961 + 2477476 = 281^2 + 1574^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2556437 - 2⁶ = 2556373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2556457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3014 + ... + 3767.

It is an arithmetic number, because the mean of its divisors is an integer number (356055).

2^2556437 is an apocalyptic number.

It is an amenable number.

2556437 is a deficient number, since it is larger than the sum of its proper divisors (292003).

2556437 is a wasteful number, since it uses less digits than its factorization.

2556437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6823.

The product of its digits is 25200, while the sum is 32.

The square root of 2556437 is about 1598.8861748105. The cubic root of 2556437 is about 136.7345812231.

The spelling of 2556437 in words is "two million, five hundred fifty-six thousand, four hundred thirty-seven".