12347742 has 32 divisors (see below), whose sum is σ = 27391104. Its totient is φ = 3679200.

The previous prime is 12347737. The next prime is 12347749. The reversal of 12347742 is 24774321.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12347749) 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, 2493 + ... + 5559.

It is an arithmetic number, because the mean of its divisors is an integer number (855972).

Almost surely, 2^12347742 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12347742, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13695552).

12347742 is an abundant number, since it is smaller than the sum of its proper divisors (15043362).

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

12347742 is a wasteful number, since it uses less digits than its factorization.

12347742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3144.

The product of its digits is 9408, while the sum is 30.

The square root of 12347742 is about 3513.9354006584. The cubic root of 12347742 is about 231.1332976283.

The spelling of 12347742 in words is "twelve million, three hundred forty-seven thousand, seven hundred forty-two".