126139 has 8 divisors (see below), whose sum is σ = 140672. Its totient is φ = 112320.

The previous prime is 126131. The next prime is 126143. The reversal of 126139 is 931621.

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

It is not a de Polignac number, because 126139 - 2³ = 126131 is a prime.

It is a super-2 number, since 2×126139² = 31822094642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126131) 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, 247 + ... + 559.

It is an arithmetic number, because the mean of its divisors is an integer number (17584).

2¹²⁶¹³⁹ is an apocalyptic number.

126139 is a deficient number, since it is larger than the sum of its proper divisors (14533).

126139 is a wasteful number, since it uses less digits than its factorization.

126139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357.

The product of its digits is 324, while the sum is 22.

The square root of 126139 is about 355.1605270860. The cubic root of 126139 is about 50.1514077179.

The spelling of 126139 in words is "one hundred twenty-six thousand, one hundred thirty-nine".