312001 has 4 divisors (see below), whose sum is σ = 330372. Its totient is φ = 293632.

The previous prime is 311981. The next prime is 312007. The reversal of 312001 is 100213.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 104976 + 207025 = 324^2 + 455^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312001 is a prime.

It is a Duffinian number.

312001 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (312007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9160 + ... + 9193.

It is an arithmetic number, because the mean of its divisors is an integer number (82593).

2³¹²⁰⁰¹ is an apocalyptic number.

It is an amenable number.

312001 is a deficient number, since it is larger than the sum of its proper divisors (18371).

312001 is a wasteful number, since it uses less digits than its factorization.

312001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18370.

The product of its (nonzero) digits is 6, while the sum is 7.

The square root of 312001 is about 558.5704968936. The cubic root of 312001 is about 67.8243013220.

Adding to 312001 its reverse (100213), we get a palindrome (412214).

The spelling of 312001 in words is "three hundred twelve thousand, one", and thus it is an iban number.