265140409 has 8 divisors (see below), whose sum is σ = 272529920. Its totient is φ = 257762736.

The previous prime is 265140367. The next prime is 265140419. The reversal of 265140409 is 904041562.

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

It is a cyclic number.

It is not a de Polignac number, because 265140409 - 2¹¹ = 265138361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (265140419) 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, 61672 + ... + 65830.

It is an arithmetic number, because the mean of its divisors is an integer number (34066240).

Almost surely, 2^265140409 is an apocalyptic number.

It is an amenable number.

265140409 is a deficient number, since it is larger than the sum of its proper divisors (7389511).

265140409 is a wasteful number, since it uses less digits than its factorization.

265140409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5919.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 265140409 is about 16283.1326531476. The cubic root of 265140409 is about 642.4292514972.

The spelling of 265140409 in words is "two hundred sixty-five million, one hundred forty thousand, four hundred nine".