31742 has 8 divisors (see below), whose sum is σ = 48600. Its totient is φ = 15544.

The previous prime is 31741. The next prime is 31751. The reversal of 31742 is 24713.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 31742.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17 + ... + 252.

It is an arithmetic number, because the mean of its divisors is an integer number (6075).

2³¹⁷⁴² is an apocalyptic number.

31742 is a deficient number, since it is larger than the sum of its proper divisors (16858).

31742 is a wasteful number, since it uses less digits than its factorization.

31742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330.

The product of its digits is 168, while the sum is 17.

The square root of 31742 is about 178.1628468565. The cubic root of 31742 is about 31.6624678951.

The spelling of 31742 in words is "thirty-one thousand, seven hundred forty-two".