321425125 has 64 divisors (see below), whose sum is σ = 485222400. Its totient is φ = 207916800.

The previous prime is 321425107. The next prime is 321425149. The reversal of 321425125 is 521524123.

It is not a de Polignac number, because 321425125 - 2¹⁷ = 321294053 is a prime.

It is a super-2 number, since 2×321425125² = 206628221962531250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 321425125.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1344756 + ... + 1344994.

It is an arithmetic number, because the mean of its divisors is an integer number (7581600).

Almost surely, 2^321425125 is an apocalyptic number.

321425125 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

321425125 is a deficient number, since it is larger than the sum of its proper divisors (163797275).

321425125 is a wasteful number, since it uses less digits than its factorization.

321425125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343 (or 333 counting only the distinct ones).

The product of its digits is 2400, while the sum is 25.

The square root of 321425125 is about 17928.3330234576. Note that the first 3 decimals coincide. The cubic root of 321425125 is about 685.0042623210.

Adding to 321425125 its reverse (521524123), we get a palindrome (842949248).

The spelling of 321425125 in words is "three hundred twenty-one million, four hundred twenty-five thousand, one hundred twenty-five".