126091 has 4 divisors (see below), whose sum is σ = 144112. Its totient is φ = 108072.

The previous prime is 126079. The next prime is 126097. The reversal of 126091 is 190621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190621 = 17 ⋅11213.

It is a cyclic number.

It is not a de Polignac number, because 126091 - 2⁷ = 125963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126097) 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, 9000 + ... + 9013.

It is an arithmetic number, because the mean of its divisors is an integer number (36028).

2¹²⁶⁰⁹¹ is an apocalyptic number.

126091 is a deficient number, since it is larger than the sum of its proper divisors (18021).

126091 is an equidigital number, since it uses as much as digits as its factorization.

126091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18020.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 126091 is about 355.0929455790. The cubic root of 126091 is about 50.1450454959.

The spelling of 126091 in words is "one hundred twenty-six thousand, ninety-one".