2140191 has 12 divisors (see below), whose sum is σ = 3175432. Its totient is φ = 1388016.

The previous prime is 2140169. The next prime is 2140199. The reversal of 2140191 is 1910412.

It is not a de Polignac number, because 2140191 - 2¹⁰ = 2139167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2140199) 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, 2881 + ... + 3546.

2^2140191 is an apocalyptic number.

2140191 is a deficient number, since it is larger than the sum of its proper divisors (1035241).

2140191 is a wasteful number, since it uses less digits than its factorization.

2140191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6470 (or 6467 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 2140191 is about 1462.9391648322. The cubic root of 2140191 is about 128.8697080003.

It can be divided in two parts, 21401 and 91, that multiplied together give a palindrome (1947491).

The spelling of 2140191 in words is "two million, one hundred forty thousand, one hundred ninety-one".