425724581 has 4 divisors (see below), whose sum is σ = 439457664. Its totient is φ = 411991500.

The previous prime is 425724577. The next prime is 425724667. The reversal of 425724581 is 185427524.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 425724581 - 2² = 425724577 is a prime.

It is a super-2 number, since 2×425724581² = 362482837735251122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425724571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6866495 + ... + 6866556.

It is an arithmetic number, because the mean of its divisors is an integer number (109864416).

Almost surely, 2^425724581 is an apocalyptic number.

It is an amenable number.

425724581 is a deficient number, since it is larger than the sum of its proper divisors (13733083).

425724581 is a wasteful number, since it uses less digits than its factorization.

425724581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13733082.

The product of its digits is 89600, while the sum is 38.

The square root of 425724581 is about 20633.0943147168. The cubic root of 425724581 is about 752.2743294479.

The spelling of 425724581 in words is "four hundred twenty-five million, seven hundred twenty-four thousand, five hundred eighty-one".