12981742 has 4 divisors (see below), whose sum is σ = 19472616. Its totient is φ = 6490870.

The previous prime is 12981737. The next prime is 12981751. The reversal of 12981742 is 24718921.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 12981698 and 12981707.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3245434 + ... + 3245437.

It is an arithmetic number, because the mean of its divisors is an integer number (4868154).

Almost surely, 2^12981742 is an apocalyptic number.

12981742 is a deficient number, since it is larger than the sum of its proper divisors (6490874).

12981742 is an equidigital number, since it uses as much as digits as its factorization.

12981742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6490873.

The product of its digits is 8064, while the sum is 34.

The square root of 12981742 is about 3603.0184567942. The cubic root of 12981742 is about 235.0233385603.

The spelling of 12981742 in words is "twelve million, nine hundred eighty-one thousand, seven hundred forty-two".