321240401 has 8 divisors (see below), whose sum is σ = 337596864. Its totient is φ = 305287920.

The previous prime is 321240397. The next prime is 321240421. The reversal of 321240401 is 104042123.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 321240401 - 2² = 321240397 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 321240401.

It is not an unprimeable number, because it can be changed into a prime (321240421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99365 + ... + 102546.

It is an arithmetic number, because the mean of its divisors is an integer number (42199608).

Almost surely, 2^321240401 is an apocalyptic number.

It is an amenable number.

321240401 is a deficient number, since it is larger than the sum of its proper divisors (16356463).

321240401 is a wasteful number, since it uses less digits than its factorization.

321240401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201991.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 321240401 is about 17923.1805492217. The cubic root of 321240401 is about 684.8730124947.

Adding to 321240401 its reverse (104042123), we get a palindrome (425282524).

The spelling of 321240401 in words is "three hundred twenty-one million, two hundred forty thousand, four hundred one".