425705805 has 96 divisors (see below), whose sum is σ = 880678656. Its totient is φ = 186181632.

The previous prime is 425705801. The next prime is 425705821. The reversal of 425705805 is 508507524.

It is a happy number.

425705805 is a `hidden beast` number, since 4 + 2 + 5 + 70 + 580 + 5 = 666.

It is not a de Polignac number, because 425705805 - 2² = 425705801 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 425705805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425705801) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 717589 + ... + 718181.

It is an arithmetic number, because the mean of its divisors is an integer number (9173736).

Almost surely, 2^425705805 is an apocalyptic number.

425705805 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

425705805 is an abundant number, since it is smaller than the sum of its proper divisors (454972851).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

425705805 is a wasteful number, since it uses less digits than its factorization.

425705805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707 (or 704 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 36.

The square root of 425705805 is about 20632.6393125068. The cubic root of 425705805 is about 752.2632699421.

The spelling of 425705805 in words is "four hundred twenty-five million, seven hundred five thousand, eight hundred five".