250002565 has 4 divisors (see below), whose sum is σ = 300003084. Its totient is φ = 200002048.

The previous prime is 250002553. The next prime is 250002581. The reversal of 250002565 is 565200052.

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

It can be written as a sum of positive squares in 2 ways, for example, as 27217089 + 222785476 = 5217^2 + 14926^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-250002565 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25000252 + ... + 25000261.

It is an arithmetic number, because the mean of its divisors is an integer number (75000771).

Almost surely, 2^250002565 is an apocalyptic number.

It is an amenable number.

250002565 is a deficient number, since it is larger than the sum of its proper divisors (50000519).

250002565 is an equidigital number, since it uses as much as digits as its factorization.

250002565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50000518.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 250002565 is about 15811.4694130558. The cubic root of 250002565 is about 629.9626794051.

The spelling of 250002565 in words is "two hundred fifty million, two thousand, five hundred sixty-five".