12393481 has 8 divisors (see below), whose sum is σ = 13152960. Its totient is φ = 11652432.

The previous prime is 12393473. The next prime is 12393487. The reversal of 12393481 is 18439321.

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 12393481 - 2³ = 12393473 is a prime.

It is a super-2 number, since 2×12393481² = 307196742594722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12393487) 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 7 ways as a sum of consecutive naturals, for example, 3210 + ... + 5923.

It is an arithmetic number, because the mean of its divisors is an integer number (1644120).

Almost surely, 2^12393481 is an apocalyptic number.

It is an amenable number.

12393481 is a deficient number, since it is larger than the sum of its proper divisors (759479).

12393481 is an equidigital number, since it uses as much as digits as its factorization.

12393481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9215.

The product of its digits is 5184, while the sum is 31.

The square root of 12393481 is about 3520.4376148428. The cubic root of 12393481 is about 231.4183370359.

The spelling of 12393481 in words is "twelve million, three hundred ninety-three thousand, four hundred eighty-one".