12139743 has 16 divisors (see below), whose sum is σ = 20180736. Its totient is φ = 6306240.

The previous prime is 12139741. The next prime is 12139753. The reversal of 12139743 is 34793121.

It is not a de Polignac number, because 12139743 - 2¹ = 12139741 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12139743.

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 in 15 ways as a sum of consecutive naturals, for example, 26046 + ... + 26507.

It is an arithmetic number, because the mean of its divisors is an integer number (1261296).

Almost surely, 2^12139743 is an apocalyptic number.

12139743 is a deficient number, since it is larger than the sum of its proper divisors (8040993).

12139743 is a wasteful number, since it uses less digits than its factorization.

12139743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52574.

The product of its digits is 4536, while the sum is 30.

The square root of 12139743 is about 3484.2133975978. The cubic root of 12139743 is about 229.8281198523.

The spelling of 12139743 in words is "twelve million, one hundred thirty-nine thousand, seven hundred forty-three".