12387901 has 4 divisors (see below), whose sum is σ = 12815100. Its totient is φ = 11960704.

The previous prime is 12387887. The next prime is 12387937. The reversal of 12387901 is 10978321.

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 4519876 + 7868025 = 2126^2 + 2805^2 .

It is a cyclic number.

It is not a de Polignac number, because 12387901 - 2¹⁹ = 11863613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12387971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213556 + ... + 213613.

It is an arithmetic number, because the mean of its divisors is an integer number (3203775).

Almost surely, 2^12387901 is an apocalyptic number.

It is an amenable number.

12387901 is a deficient number, since it is larger than the sum of its proper divisors (427199).

12387901 is an equidigital number, since it uses as much as digits as its factorization.

12387901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427198.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 12387901 is about 3519.6450105089. The cubic root of 12387901 is about 231.3836008127.

The spelling of 12387901 in words is "twelve million, three hundred eighty-seven thousand, nine hundred one".