2556345 has 16 divisors (see below), whose sum is σ = 4462272. Its totient is φ = 1239360.

The previous prime is 2556331. The next prime is 2556373. The reversal of 2556345 is 5436552.

It is not a de Polignac number, because 2556345 - 2⁷ = 2556217 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7582 + ... + 7911.

It is an arithmetic number, because the mean of its divisors is an integer number (278892).

2^2556345 is an apocalyptic number.

It is an amenable number.

2556345 is a deficient number, since it is larger than the sum of its proper divisors (1905927).

2556345 is a wasteful number, since it uses less digits than its factorization.

2556345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15512.

The product of its digits is 18000, while the sum is 30.

The square root of 2556345 is about 1598.8574045236. The cubic root of 2556345 is about 136.7329409542.

The spelling of 2556345 in words is "two million, five hundred fifty-six thousand, three hundred forty-five".