12139742 has 4 divisors (see below), whose sum is σ = 18209616. Its totient is φ = 6069870.

The previous prime is 12139741. The next prime is 12139753. The reversal of 12139742 is 24793121.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12139741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3034934 + ... + 3034937.

It is an arithmetic number, because the mean of its divisors is an integer number (4552404).

Almost surely, 2^12139742 is an apocalyptic number.

12139742 is a deficient number, since it is larger than the sum of its proper divisors (6069874).

12139742 is an equidigital number, since it uses as much as digits as its factorization.

12139742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6069873.

The product of its digits is 3024, while the sum is 29.

The square root of 12139742 is about 3484.2132540934. The cubic root of 12139742 is about 229.8281135416.

The spelling of 12139742 in words is "twelve million, one hundred thirty-nine thousand, seven hundred forty-two".