12661742 has 8 divisors (see below), whose sum is σ = 19072800. Its totient is φ = 6304144.

The previous prime is 12661741. The next prime is 12661769. The reversal of 12661742 is 24716621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12661741) 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, 12767 + ... + 13722.

It is an arithmetic number, because the mean of its divisors is an integer number (2384100).

Almost surely, 2^12661742 is an apocalyptic number.

12661742 is a deficient number, since it is larger than the sum of its proper divisors (6411058).

12661742 is a wasteful number, since it uses less digits than its factorization.

12661742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26730.

The product of its digits is 4032, while the sum is 29.

The square root of 12661742 is about 3558.3341608118. The cubic root of 12661742 is about 233.0761415577.

The spelling of 12661742 in words is "twelve million, six hundred sixty-one thousand, seven hundred forty-two".