12140191 has 6 divisors (see below), whose sum is σ = 14122320. Its totient is φ = 10405836.

The previous prime is 12140153. The next prime is 12140201. The reversal of 12140191 is 19104121.

It is not a de Polignac number, because 12140191 - 2⁹ = 12139679 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 (12140111) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 123831 + ... + 123928.

It is an arithmetic number, because the mean of its divisors is an integer number (2353720).

Almost surely, 2^12140191 is an apocalyptic number.

12140191 is a deficient number, since it is larger than the sum of its proper divisors (1982129).

12140191 is an equidigital number, since it uses as much as digits as its factorization.

12140191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247773 (or 247766 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 12140191 is about 3484.2776869819. The cubic root of 12140191 is about 229.8309469778.

The spelling of 12140191 in words is "twelve million, one hundred forty thousand, one hundred ninety-one".