1142191 has 2 divisors, whose sum is σ = 1142192. Its totient is φ = 1142190.

The previous prime is 1142171. The next prime is 1142201. The reversal of 1142191 is 1912411.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1142191 - 2⁵ = 1142159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1142131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571095 + 571096.

It is an arithmetic number, because the mean of its divisors is an integer number (571096).

2^1142191 is an apocalyptic number.

1142191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1142191 is an equidigital number, since it uses as much as digits as its factorization.

1142191 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1142191 is about 1068.7333624436. The cubic root of 1142191 is about 104.5312742639.

The spelling of 1142191 in words is "one million, one hundred forty-two thousand, one hundred ninety-one".