425365681 has 4 divisors (see below), whose sum is σ = 458086132. Its totient is φ = 392645232.

The previous prime is 425365643. The next prime is 425365739. The reversal of 425365681 is 186563524.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 34117281 + 391248400 = 5841^2 + 19780^2 .

It is a cyclic number.

It is not a de Polignac number, because 425365681 - 2⁹ = 425365169 is a prime.

It is a super-2 number, since 2×425365681² = 361871925145187522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (425365481) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 16360206 + ... + 16360231.

It is an arithmetic number, because the mean of its divisors is an integer number (114521533).

Almost surely, 2^425365681 is an apocalyptic number.

It is an amenable number.

425365681 is a deficient number, since it is larger than the sum of its proper divisors (32720451).

425365681 is a wasteful number, since it uses less digits than its factorization.

425365681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32720450.

The product of its digits is 172800, while the sum is 40.

The square root of 425365681 is about 20624.3952881048. The cubic root of 425365681 is about 752.0628725773.

The spelling of 425365681 in words is "four hundred twenty-five million, three hundred sixty-five thousand, six hundred eighty-one".