320442425 has 6 divisors (see below), whose sum is σ = 397348638. Its totient is φ = 256353920.

The previous prime is 320442403. The next prime is 320442449. The reversal of 320442425 is 524244023.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 2319529 + 318122896 = 1523^2 + 17836^2 .

It is not a de Polignac number, because 320442425 - 2⁶ = 320442361 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320442394 and 320442403.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6408824 + ... + 6408873.

It is an arithmetic number, because the mean of its divisors is an integer number (66224773).

Almost surely, 2^320442425 is an apocalyptic number.

It is an amenable number.

320442425 is a deficient number, since it is larger than the sum of its proper divisors (76906213).

320442425 is a wasteful number, since it uses less digits than its factorization.

320442425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12817707 (or 12817702 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 26.

The square root of 320442425 is about 17900.9057033436. The cubic root of 320442425 is about 684.3054568869.

Adding to 320442425 its reverse (524244023), we get a palindrome (844686448).

The spelling of 320442425 in words is "three hundred twenty million, four hundred forty-two thousand, four hundred twenty-five".