1142001191 has 4 divisors (see below), whose sum is σ = 1160722584. Its totient is φ = 1123279800.

The previous prime is 1142001173. The next prime is 1142001209. The reversal of 1142001191 is 1911002411.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1142001173) and next prime (1142001209).

It is a cyclic number.

It is not a de Polignac number, because 1142001191 - 2¹⁴ = 1141984807 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 (1142021191) 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, 9360605 + ... + 9360726.

It is an arithmetic number, because the mean of its divisors is an integer number (290180646).

Almost surely, 2^1142001191 is an apocalyptic number.

1142001191 is a deficient number, since it is larger than the sum of its proper divisors (18721393).

1142001191 is an equidigital number, since it uses as much as digits as its factorization.

1142001191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18721392.

The product of its (nonzero) digits is 72, while the sum is 20.

The square root of 1142001191 is about 33793.5081191640. The cubic root of 1142001191 is about 1045.2548361658.

The spelling of 1142001191 in words is "one billion, one hundred forty-two million, one thousand, one hundred ninety-one".