12381742 has 4 divisors (see below), whose sum is σ = 18572616. Its totient is φ = 6190870.

The previous prime is 12381731. The next prime is 12381757. The reversal of 12381742 is 24718321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24718321 = 757 ⋅32653.

It is a super-3 number, since 3×12381742³ (a number of 22 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12381742.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3095434 + ... + 3095437.

It is an arithmetic number, because the mean of its divisors is an integer number (4643154).

Almost surely, 2^12381742 is an apocalyptic number.

12381742 is a deficient number, since it is larger than the sum of its proper divisors (6190874).

12381742 is an equidigital number, since it uses as much as digits as its factorization.

12381742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6190873.

The product of its digits is 2688, while the sum is 28.

The square root of 12381742 is about 3518.7699555384. The cubic root of 12381742 is about 231.3452481265.

The spelling of 12381742 in words is "twelve million, three hundred eighty-one thousand, seven hundred forty-two".