139066 has 8 divisors (see below), whose sum is σ = 215424. Its totient is φ = 67260.

The previous prime is 139033. The next prime is 139067. The reversal of 139066 is 660931.

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 139066.

It is not an unprimeable number, because it can be changed into a prime (139067) 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, 1060 + ... + 1183.

It is an arithmetic number, because the mean of its divisors is an integer number (26928).

2¹³⁹⁰⁶⁶ is an apocalyptic number.

139066 is a deficient number, since it is larger than the sum of its proper divisors (76358).

139066 is a wasteful number, since it uses less digits than its factorization.

139066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2276.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 139066 is about 372.9155400355. The cubic root of 139066 is about 51.8092120983.

Adding to 139066 its reverse (660931), we get a palindrome (799997).

It can be divided in two parts, 13906 and 6, that multiplied together give a triangular number (83436 = T₄₀₈).

The spelling of 139066 in words is "one hundred thirty-nine thousand, sixty-six".