12143742 has 16 divisors (see below), whose sum is σ = 26155920. Its totient is φ = 3736512.

The previous prime is 12143741. The next prime is 12143743. The reversal of 12143742 is 24734121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12143741) and next prime (12143743).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12143741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77767 + ... + 77922.

It is an arithmetic number, because the mean of its divisors is an integer number (1634745).

Almost surely, 2^12143742 is an apocalyptic number.

12143742 is an abundant number, since it is smaller than the sum of its proper divisors (14012178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12143742 is a wasteful number, since it uses less digits than its factorization.

12143742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155707.

The product of its digits is 1344, while the sum is 24.

The square root of 12143742 is about 3484.7872244945. The cubic root of 12143742 is about 229.8533532736.

Adding to 12143742 its reverse (24734121), we get a palindrome (36877863).

The spelling of 12143742 in words is "twelve million, one hundred forty-three thousand, seven hundred forty-two".