312501401 has 4 divisors (see below), whose sum is σ = 312762804. Its totient is φ = 312240000.

The previous prime is 312501389. The next prime is 312501433. The reversal of 312501401 is 104105213.

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 101525776 + 210975625 = 10076^2 + 14525^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312501401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 312501401.

It is not an unprimeable number, because it can be changed into a prime (312501461) 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, 128900 + ... + 131301.

It is an arithmetic number, because the mean of its divisors is an integer number (78190701).

Almost surely, 2^312501401 is an apocalyptic number.

It is an amenable number.

312501401 is a deficient number, since it is larger than the sum of its proper divisors (261403).

312501401 is a wasteful number, since it uses less digits than its factorization.

312501401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261402.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 312501401 is about 17677.7091558833. The cubic root of 312501401 is about 678.6054182536.

Adding to 312501401 its reverse (104105213), we get a palindrome (416606614).

The spelling of 312501401 in words is "three hundred twelve million, five hundred one thousand, four hundred one".