425256321 has 16 divisors (see below), whose sum is σ = 648445824. Its totient is φ = 242840064.

The previous prime is 425256313. The next prime is 425256331. The reversal of 425256321 is 123652524.

It is not a de Polignac number, because 425256321 - 2³ = 425256313 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (425256301) 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 15 ways as a sum of consecutive naturals, for example, 29671 + ... + 41603.

It is an arithmetic number, because the mean of its divisors is an integer number (40527864).

Almost surely, 2^425256321 is an apocalyptic number.

It is an amenable number.

425256321 is a deficient number, since it is larger than the sum of its proper divisors (223189503).

425256321 is a wasteful number, since it uses less digits than its factorization.

425256321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13640.

The product of its digits is 14400, while the sum is 30.

The square root of 425256321 is about 20621.7438884300. The cubic root of 425256321 is about 751.9984161588.

The spelling of 425256321 in words is "four hundred twenty-five million, two hundred fifty-six thousand, three hundred twenty-one".