2556471 has 8 divisors (see below), whose sum is σ = 3481344. Its totient is φ = 1667960.

The previous prime is 2556467. The next prime is 2556487. The reversal of 2556471 is 1746552.

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 2556471 - 2² = 2556467 is a prime.

It is a super-3 number, since 3×2556471³ = 50123785915047825333, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2556451) 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, 8925 + ... + 9206.

It is an arithmetic number, because the mean of its divisors is an integer number (435168).

2^2556471 is an apocalyptic number.

2556471 is a deficient number, since it is larger than the sum of its proper divisors (924873).

2556471 is a wasteful number, since it uses less digits than its factorization.

2556471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18181.

The product of its digits is 8400, while the sum is 30.

The square root of 2556471 is about 1598.8968071767. The cubic root of 2556471 is about 136.7351873995.

The spelling of 2556471 in words is "two million, five hundred fifty-six thousand, four hundred seventy-one".