9742 has 4 divisors (see below), whose sum is σ = 14616. Its totient is φ = 4870.

The previous prime is 9739. The next prime is 9743. The reversal of 9742 is 2479.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2479 = 37 ⋅67.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 12 and base 14.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2434 + ... + 2437.

It is an arithmetic number, because the mean of its divisors is an integer number (3654).

9742 is a deficient number, since it is larger than the sum of its proper divisors (4874).

9742 is a wasteful number, since it uses less digits than its factorization.

9742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4873.

The product of its digits is 504, while the sum is 22.

The square root of 9742 is about 98.7015704029. The cubic root of 9742 is about 21.3574488576.

Adding to 9742 its reverse (2479), we get a palindrome (12221).

The spelling of 9742 in words is "nine thousand, seven hundred forty-two".