1125191 has 4 divisors (see below), whose sum is σ = 1127352. Its totient is φ = 1123032.

The previous prime is 1125169. The next prime is 1125193. The reversal of 1125191 is 1915211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1915211 = 31 ⋅61781.

It is a cyclic number.

It is not a de Polignac number, because 1125191 - 2⁶ = 1125127 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 (1125193) 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, 236 + ... + 1518.

It is an arithmetic number, because the mean of its divisors is an integer number (281838).

2^1125191 is an apocalyptic number.

1125191 is a deficient number, since it is larger than the sum of its proper divisors (2161).

1125191 is an equidigital number, since it uses as much as digits as its factorization.

1125191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2160.

The product of its digits is 90, while the sum is 20.

The square root of 1125191 is about 1060.7502062220. The cubic root of 1125191 is about 104.0100766863.

Adding to 1125191 its sum of digits (20), we get a palindrome (1125211).

The spelling of 1125191 in words is "one million, one hundred twenty-five thousand, one hundred ninety-one".