12381001 has 4 divisors (see below), whose sum is σ = 12406912. Its totient is φ = 12355092.

The previous prime is 12380971. The next prime is 12381011. The reversal of 12381001 is 10018321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12381001 - 2¹³ = 12372809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12381011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12225 + ... + 13198.

It is an arithmetic number, because the mean of its divisors is an integer number (3101728).

Almost surely, 2^12381001 is an apocalyptic number.

It is an amenable number.

12381001 is a deficient number, since it is larger than the sum of its proper divisors (25911).

12381001 is an equidigital number, since it uses as much as digits as its factorization.

12381001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25910.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 12381001 is about 3518.6646614874. The cubic root of 12381001 is about 231.3406329911.

Adding to 12381001 its reverse (10018321), we get a palindrome (22399322).

The spelling of 12381001 in words is "twelve million, three hundred eighty-one thousand, one".