425440321 has 4 divisors (see below), whose sum is σ = 430566192. Its totient is φ = 420314452.

The previous prime is 425440297. The next prime is 425440331. The reversal of 425440321 is 123044524.

It is a happy number.

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 425440321 - 2⁵ = 425440289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (425440331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2562811 + ... + 2562976.

It is an arithmetic number, because the mean of its divisors is an integer number (107641548).

Almost surely, 2^425440321 is an apocalyptic number.

It is an amenable number.

425440321 is a deficient number, since it is larger than the sum of its proper divisors (5125871).

425440321 is an equidigital number, since it uses as much as digits as its factorization.

425440321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5125870.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 425440321 is about 20626.2047163311. The cubic root of 425440321 is about 752.1068588009.

Adding to 425440321 its reverse (123044524), we get a palindrome (548484845).

The spelling of 425440321 in words is "four hundred twenty-five million, four hundred forty thousand, three hundred twenty-one".