425620321 has 24 divisors (see below), whose sum is σ = 513237120. Its totient is φ = 351685152.

The previous prime is 425620319. The next prime is 425620331. The reversal of 425620321 is 123026524.

It is not a de Polignac number, because 425620321 - 2¹ = 425620319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (425620301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 165175 + ... + 167731.

It is an arithmetic number, because the mean of its divisors is an integer number (21384880).

Almost surely, 2^425620321 is an apocalyptic number.

It is an amenable number.

425620321 is a deficient number, since it is larger than the sum of its proper divisors (87616799).

425620321 is a wasteful number, since it uses less digits than its factorization.

425620321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2693 (or 2686 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 425620321 is about 20630.5676363982. The cubic root of 425620321 is about 752.2129137435.

Adding to 425620321 its reverse (123026524), we get a palindrome (548646845).

The spelling of 425620321 in words is "four hundred twenty-five million, six hundred twenty thousand, three hundred twenty-one".