265925985 has 64 divisors (see below), whose sum is σ = 490758912. Its totient is φ = 121798656.

The previous prime is 265925983. The next prime is 265925999. The reversal of 265925985 is 589529562.

It is not a de Polignac number, because 265925985 - 2¹ = 265925983 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (265925983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 321142 + ... + 321968.

It is an arithmetic number, because the mean of its divisors is an integer number (7668108).

Almost surely, 2^265925985 is an apocalyptic number.

It is an amenable number.

265925985 is a deficient number, since it is larger than the sum of its proper divisors (224832927).

265925985 is a wasteful number, since it uses less digits than its factorization.

265925985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 962.

The product of its digits is 1944000, while the sum is 51.

The square root of 265925985 is about 16307.2371970239. The cubic root of 265925985 is about 643.0631035657.

The spelling of 265925985 in words is "two hundred sixty-five million, nine hundred twenty-five thousand, nine hundred eighty-five".