2565445 has 8 divisors (see below), whose sum is σ = 3092760. Its totient is φ = 2042880.

The previous prime is 2565403. The next prime is 2565449. The reversal of 2565445 is 5445652.

It can be written as a sum of positive squares in 4 ways, for example, as 261121 + 2304324 = 511^2 + 1518^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-2565445 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2565449) 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, 141 + ... + 2269.

It is an arithmetic number, because the mean of its divisors is an integer number (386595).

2^2565445 is an apocalyptic number.

It is an amenable number.

2565445 is a deficient number, since it is larger than the sum of its proper divisors (527315).

2565445 is a wasteful number, since it uses less digits than its factorization.

2565445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2375.

The product of its digits is 24000, while the sum is 31.

The square root of 2565445 is about 1601.7006586750. The cubic root of 2565445 is about 136.8949947507.

The spelling of 2565445 in words is "two million, five hundred sixty-five thousand, four hundred forty-five".