265625005 has 4 divisors (see below), whose sum is σ = 318750012. Its totient is φ = 212500000.

The previous prime is 265624993. The next prime is 265625011. The reversal of 265625005 is 500526562.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 500526562 = 2 ⋅250263281.

It can be written as a sum of positive squares in 2 ways, for example, as 73719396 + 191905609 = 8586^2 + 13853^2 .

It is a de Polignac number, because none of the positive numbers 2^k-265625005 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, 26562496 + ... + 26562505.

It is an arithmetic number, because the mean of its divisors is an integer number (79687503).

Almost surely, 2^265625005 is an apocalyptic number.

It is an amenable number.

265625005 is a deficient number, since it is larger than the sum of its proper divisors (53125007).

265625005 is an equidigital number, since it uses as much as digits as its factorization.

265625005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53125006.

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 265625005 is about 16298.0061663996. The cubic root of 265625005 is about 642.8204016979.

The spelling of 265625005 in words is "two hundred sixty-five million, six hundred twenty-five thousand, five".