2564018 has 4 divisors (see below), whose sum is σ = 3846030. Its totient is φ = 1282008.

The previous prime is 2564011. The next prime is 2564027. The reversal of 2564018 is 8104652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1570009 + 994009 = 1253^2 + 997^2 .

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2564011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 641003 + ... + 641006.

2^2564018 is an apocalyptic number.

2564018 is a deficient number, since it is larger than the sum of its proper divisors (1282012).

2564018 is a wasteful number, since it uses less digits than its factorization.

2564018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1282011.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 2564018 is about 1601.2551327006. The cubic root of 2564018 is about 136.8696079414.

The spelling of 2564018 in words is "two million, five hundred sixty-four thousand, eighteen".