139706 has 16 divisors (see below), whose sum is σ = 254016. Its totient is φ = 56256.

The previous prime is 139703. The next prime is 139709. The reversal of 139706 is 607931.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (139703) and next prime (139709).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (139703) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56 + ... + 531.

It is an arithmetic number, because the mean of its divisors is an integer number (15876).

2¹³⁹⁷⁰⁶ is an apocalyptic number.

139706 is a deficient number, since it is larger than the sum of its proper divisors (114310).

139706 is a wasteful number, since it uses less digits than its factorization.

139706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613.

The product of its (nonzero) digits is 1134, while the sum is 26.

The square root of 139706 is about 373.7726581761. The cubic root of 139706 is about 51.8885680869. Note that the first 3 decimals are identical.

The spelling of 139706 in words is "one hundred thirty-nine thousand, seven hundred six".