140091 has 12 divisors (see below), whose sum is σ = 217512. Its totient is φ = 79968.

The previous prime is 140071. The next prime is 140111. The reversal of 140091 is 190041.

140091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (140071) and next prime (140111).

It is not a de Polignac number, because 140091 - 2¹⁰ = 139067 is a prime.

It is an Ulam number.

140091 is a lucky number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 140091.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 140091.

It is not an unprimeable number, because it can be changed into a prime (140071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 330 + ... + 623.

It is an arithmetic number, because the mean of its divisors is an integer number (18126).

2¹⁴⁰⁰⁹¹ is an apocalyptic number.

140091 is a deficient number, since it is larger than the sum of its proper divisors (77421).

140091 is an equidigital number, since it uses as much as digits as its factorization.

140091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970 (or 963 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 140091 is about 374.2873227883. The cubic root of 140091 is about 51.9361889857.

The spelling of 140091 in words is "one hundred forty thousand, ninety-one".