420872265 has 24 divisors (see below), whose sum is σ = 795832128. Its totient is φ = 204059040.

The previous prime is 420872251. The next prime is 420872303. The reversal of 420872265 is 562278024.

420872265 is a `hidden beast` number, since 420 + 8 + 7 + 226 + 5 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-420872265 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 424629 + ... + 425618.

It is an arithmetic number, because the mean of its divisors is an integer number (33159672).

Almost surely, 2^420872265 is an apocalyptic number.

420872265 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

420872265 is a deficient number, since it is larger than the sum of its proper divisors (374959863).

420872265 is a wasteful number, since it uses less digits than its factorization.

420872265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850269 (or 850266 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 420872265 is about 20515.1715810519. The cubic root of 420872265 is about 749.4053152580.

The spelling of 420872265 in words is "four hundred twenty million, eight hundred seventy-two thousand, two hundred sixty-five".