265420605 has 32 divisors (see below), whose sum is σ = 440275968. Its totient is φ = 136396800.

The previous prime is 265420583. The next prime is 265420607. The reversal of 265420605 is 506024562.

It is not a de Polignac number, because 265420605 - 2¹² = 265416509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265420607) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 118395 + ... + 120615.

It is an arithmetic number, because the mean of its divisors is an integer number (13758624).

Almost surely, 2^265420605 is an apocalyptic number.

It is an amenable number.

265420605 is a deficient number, since it is larger than the sum of its proper divisors (174855363).

265420605 is a wasteful number, since it uses less digits than its factorization.

265420605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2517.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 265420605 is about 16291.7342539093. The cubic root of 265420605 is about 642.6554746962.

The spelling of 265420605 in words is "two hundred sixty-five million, four hundred twenty thousand, six hundred five".