12381951 has 8 divisors (see below), whose sum is σ = 16536960. Its totient is φ = 8240792.

The previous prime is 12381949. The next prime is 12381961. The reversal of 12381951 is 15918321.

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 12381951 - 2¹ = 12381949 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12381911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1155 + ... + 5108.

It is an arithmetic number, because the mean of its divisors is an integer number (2067120).

Almost surely, 2^12381951 is an apocalyptic number.

12381951 is a deficient number, since it is larger than the sum of its proper divisors (4155009).

12381951 is an equidigital number, since it uses as much as digits as its factorization.

12381951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6925.

The product of its digits is 2160, while the sum is 30.

The square root of 12381951 is about 3518.7996532909. The cubic root of 12381951 is about 231.3465497981.

The spelling of 12381951 in words is "twelve million, three hundred eighty-one thousand, nine hundred fifty-one".