138746 has 8 divisors (see below), whose sum is σ = 209844. Its totient is φ = 68800.

The previous prime is 138739. The next prime is 138763. The reversal of 138746 is 647831.

It can be written as a sum of positive squares in 2 ways, for example, as 96721 + 42025 = 311^2 + 205^2 .

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

Its product of digits (4032) is a multiple of the sum of its prime divisors (576).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146 + ... + 546.

2¹³⁸⁷⁴⁶ is an apocalyptic number.

138746 is a deficient number, since it is larger than the sum of its proper divisors (71098).

138746 is a wasteful number, since it uses less digits than its factorization.

138746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576.

The product of its digits is 4032, while the sum is 29.

The square root of 138746 is about 372.4862413566. The cubic root of 138746 is about 51.7694427787.

The spelling of 138746 in words is "one hundred thirty-eight thousand, seven hundred forty-six".