321305025 has 24 divisors (see below), whose sum is σ = 531840960. Its totient is φ = 171163840.

The previous prime is 321304969. The next prime is 321305059. The reversal of 321305025 is 520503123.

It is not a de Polignac number, because 321305025 - 2¹² = 321300929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 321304992 and 321305010.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81244 + ... + 85106.

It is an arithmetic number, because the mean of its divisors is an integer number (22160040).

Almost surely, 2^321305025 is an apocalyptic number.

It is an amenable number.

321305025 is a deficient number, since it is larger than the sum of its proper divisors (210535935).

321305025 is a wasteful number, since it uses less digits than its factorization.

321305025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4985 (or 4980 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 321305025 is about 17924.9832635905. The cubic root of 321305025 is about 684.9189347654.

Adding to 321305025 its reverse (520503123), we get a palindrome (841808148).

The spelling of 321305025 in words is "three hundred twenty-one million, three hundred five thousand, twenty-five".