12381953 has 4 divisors (see below), whose sum is σ = 12509700. Its totient is φ = 12254208.

The previous prime is 12381949. The next prime is 12381961. The reversal of 12381953 is 35918321.

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 7219969 + 5161984 = 2687^2 + 2272^2 .

It is a cyclic number.

It is not a de Polignac number, because 12381953 - 2² = 12381949 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12381973) 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, 63728 + ... + 63921.

It is an arithmetic number, because the mean of its divisors is an integer number (3127425).

Almost surely, 2^12381953 is an apocalyptic number.

It is an amenable number.

12381953 is a deficient number, since it is larger than the sum of its proper divisors (127747).

12381953 is an equidigital number, since it uses as much as digits as its factorization.

12381953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127746.

The product of its digits is 6480, while the sum is 32.

The square root of 12381953 is about 3518.7999374787. The cubic root of 12381953 is about 231.3465622542.

The spelling of 12381953 in words is "twelve million, three hundred eighty-one thousand, nine hundred fifty-three".