12312001 has 8 divisors (see below), whose sum is σ = 13391784. Its totient is φ = 11251200.

The previous prime is 12311989. The next prime is 12312011. The reversal of 12312001 is 10021321.

It can be written as a sum of positive squares in 4 ways, for example, as 853776 + 11458225 = 924^2 + 3385^2 .

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 12312001 - 2¹¹ = 12309953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12312011) 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, 3376 + ... + 6001.

It is an arithmetic number, because the mean of its divisors is an integer number (1673973).

Almost surely, 2^12312001 is an apocalyptic number.

It is an amenable number.

12312001 is a deficient number, since it is larger than the sum of its proper divisors (1079783).

12312001 is a wasteful number, since it uses less digits than its factorization.

12312001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9491.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 12312001 is about 3508.8461066282. The cubic root of 12312001 is about 230.9100741282.

Adding to 12312001 its reverse (10021321), we get a palindrome (22333322).

The spelling of 12312001 in words is "twelve million, three hundred twelve thousand, one".