265449985 has 16 divisors (see below), whose sum is σ = 338256000. Its totient is φ = 199288576.

The previous prime is 265449929. The next prime is 265449991. The reversal of 265449985 is 589944562.

It is a cyclic number.

It is not a de Polignac number, because 265449985 - 2²¹ = 263352833 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26166 + ... + 34864.

It is an arithmetic number, because the mean of its divisors is an integer number (21141000).

Almost surely, 2^265449985 is an apocalyptic number.

It is an amenable number.

265449985 is a deficient number, since it is larger than the sum of its proper divisors (72806015).

265449985 is a wasteful number, since it uses less digits than its factorization.

265449985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9080.

The product of its digits is 3110400, while the sum is 52.

The square root of 265449985 is about 16292.6359131971. The cubic root of 265449985 is about 642.6791861450.

The spelling of 265449985 in words is "two hundred sixty-five million, four hundred forty-nine thousand, nine hundred eighty-five".