2556416 has 20 divisors (see below), whose sum is σ = 5108862. Its totient is φ = 1277952.

The previous prime is 2556403. The next prime is 2556419. The reversal of 2556416 is 6146552.

It can be written as a sum of positive squares in only one way, i.e., 2310400 + 246016 = 1520^2 + 496^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2556419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1985 + ... + 3008.

2^2556416 is an apocalyptic number.

It is an amenable number.

2556416 is a deficient number, since it is larger than the sum of its proper divisors (2552446).

2556416 is an frugal number, since it uses more digits than its factorization.

2556416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5011 (or 4995 counting only the distinct ones).

The product of its digits is 7200, while the sum is 29.

The square root of 2556416 is about 1598.8796077254. The cubic root of 2556416 is about 136.7342068174.

The spelling of 2556416 in words is "two million, five hundred fifty-six thousand, four hundred sixteen".