265405049 has 8 divisors (see below), whose sum is σ = 326652480. Its totient is φ = 209990736.

The previous prime is 265404991. The next prime is 265405051. The reversal of 265405049 is 940504562.

It is a happy number.

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 265405049 - 2¹⁶ = 265339513 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (265485049) 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, 1458179 + ... + 1458360.

It is an arithmetic number, because the mean of its divisors is an integer number (40831560).

Almost surely, 2^265405049 is an apocalyptic number.

It is an amenable number.

265405049 is a deficient number, since it is larger than the sum of its proper divisors (61247431).

265405049 is a wasteful number, since it uses less digits than its factorization.

265405049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2916559.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 265405049 is about 16291.2568268995. The cubic root of 265405049 is about 642.6429193486.

The spelling of 265405049 in words is "two hundred sixty-five million, four hundred five thousand, forty-nine".