321264001 has 4 divisors (see below), whose sum is σ = 332342100. Its totient is φ = 310185904.

The previous prime is 321263963. The next prime is 321264017. The reversal of 321264001 is 100462123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 100462123 = 3767 ⋅26669.

It can be written as a sum of positive squares in 2 ways, for example, as 50694400 + 270569601 = 7120^2 + 16449^2 .

It is a cyclic number.

It is not a de Polignac number, because 321264001 - 2²¹ = 319166849 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 321264001.

It is not an unprimeable number, because it can be changed into a prime (321264071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5539006 + ... + 5539063.

It is an arithmetic number, because the mean of its divisors is an integer number (83085525).

Almost surely, 2^321264001 is an apocalyptic number.

It is an amenable number.

321264001 is a deficient number, since it is larger than the sum of its proper divisors (11078099).

321264001 is a wasteful number, since it uses less digits than its factorization.

321264001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11078098.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 321264001 is about 17923.8389024227. The cubic root of 321264001 is about 684.8897835352.

The spelling of 321264001 in words is "three hundred twenty-one million, two hundred sixty-four thousand, one".