1191142 has 4 divisors (see below), whose sum is σ = 1786716. Its totient is φ = 595570.

The previous prime is 1191131. The next prime is 1191149. The reversal of 1191142 is 2411911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2411911 = 163 ⋅14797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1191149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 297784 + ... + 297787.

It is an arithmetic number, because the mean of its divisors is an integer number (446679).

2^1191142 is an apocalyptic number.

1191142 is a deficient number, since it is larger than the sum of its proper divisors (595574).

1191142 is an equidigital number, since it uses as much as digits as its factorization.

1191142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595573.

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

The square root of 1191142 is about 1091.3945207852. The cubic root of 1191142 is about 106.0037378532.

The spelling of 1191142 in words is "one million, one hundred ninety-one thousand, one hundred forty-two".