2564671 has 8 divisors (see below), whose sum is σ = 2762640. Its totient is φ = 2371968.

The previous prime is 2564669. The next prime is 2564701. The reversal of 2564671 is 1764652.

It is a happy number.

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 2564671 - 2¹ = 2564669 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2564621) 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, 276 + ... + 2281.

It is an arithmetic number, because the mean of its divisors is an integer number (345330).

2^2564671 is an apocalyptic number.

2564671 is a deficient number, since it is larger than the sum of its proper divisors (197969).

2564671 is a wasteful number, since it uses less digits than its factorization.

2564671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2633.

The product of its digits is 10080, while the sum is 31.

The square root of 2564671 is about 1601.4590222669. The cubic root of 2564671 is about 136.8812261994.

The spelling of 2564671 in words is "two million, five hundred sixty-four thousand, six hundred seventy-one".