139742 has 8 divisors (see below), whose sum is σ = 211896. Its totient is φ = 69112.

The previous prime is 139739. The next prime is 139747. The reversal of 139742 is 247931.

139742 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113 + ... + 540.

It is an arithmetic number, because the mean of its divisors is an integer number (26487).

2¹³⁹⁷⁴² is an apocalyptic number.

139742 is a deficient number, since it is larger than the sum of its proper divisors (72154).

139742 is a wasteful number, since it uses less digits than its factorization.

139742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762.

The product of its digits is 1512, while the sum is 26.

The square root of 139742 is about 373.8208126897. The cubic root of 139742 is about 51.8930246552.

The spelling of 139742 in words is "one hundred thirty-nine thousand, seven hundred forty-two".