425021605 has 8 divisors (see below), whose sum is σ = 510221592. Its totient is φ = 339886848.

The previous prime is 425021579. The next prime is 425021633. The reversal of 425021605 is 506120524.

It can be written as a sum of positive squares in 4 ways, for example, as 188046369 + 236975236 = 13713^2 + 15394^2 .

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 425021605 - 2²⁵ = 391467173 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 425021605.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 592 + ... + 29161.

It is an arithmetic number, because the mean of its divisors is an integer number (63777699).

Almost surely, 2^425021605 is an apocalyptic number.

It is an amenable number.

425021605 is a deficient number, since it is larger than the sum of its proper divisors (85199987).

425021605 is a wasteful number, since it uses less digits than its factorization.

425021605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32615.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 425021605 is about 20616.0521196470. The cubic root of 425021605 is about 751.8600380128.

The spelling of 425021605 in words is "four hundred twenty-five million, twenty-one thousand, six hundred five".