2564516 has 6 divisors (see below), whose sum is σ = 4487910. Its totient is φ = 1282256.

The previous prime is 2564489. The next prime is 2564519. The reversal of 2564516 is 6154652.

It can be written as a sum of positive squares in only one way, i.e., 2262016 + 302500 = 1504^2 + 550^2 .

It is not an unprimeable number, because it can be changed into a prime (2564519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320561 + ... + 320568.

It is an arithmetic number, because the mean of its divisors is an integer number (747985).

2^2564516 is an apocalyptic number.

It is an amenable number.

2564516 is a deficient number, since it is larger than the sum of its proper divisors (1923394).

2564516 is a wasteful number, since it uses less digits than its factorization.

2564516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641133 (or 641131 counting only the distinct ones).

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

The square root of 2564516 is about 1601.4106281651. The cubic root of 2564516 is about 136.8784685985.

It can be divided in two parts, 25 and 64516, that multiplied together give a square (1612900 = 1270²).

The spelling of 2564516 in words is "two million, five hundred sixty-four thousand, five hundred sixteen".