321420025 has 12 divisors (see below), whose sum is σ = 402091452. Its totient is φ = 254858240.

The previous prime is 321419993. The next prime is 321420031. The reversal of 321420025 is 520024123.

It can be written as a sum of positive squares in 6 ways, for example, as 181494784 + 139925241 = 13472^2 + 11829^2 .

It is not a de Polignac number, because 321420025 - 2⁵ = 321419993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321419984 and 321420011.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54064 + ... + 59713.

It is an arithmetic number, because the mean of its divisors is an integer number (33507621).

Almost surely, 2^321420025 is an apocalyptic number.

It is an amenable number.

321420025 is a deficient number, since it is larger than the sum of its proper divisors (80671427).

321420025 is a wasteful number, since it uses less digits than its factorization.

321420025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113900 (or 113895 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 321420025 is about 17928.1907899263. The cubic root of 321420025 is about 685.0006393515. Note that the first 3 decimals are identical.

Adding to 321420025 its reverse (520024123), we get a palindrome (841444148).

The spelling of 321420025 in words is "three hundred twenty-one million, four hundred twenty thousand, twenty-five".