1191045 has 16 divisors (see below), whose sum is σ = 1919232. Its totient is φ = 630720.

The previous prime is 1191031. The next prime is 1191061. The reversal of 1191045 is 5401911.

It is not a de Polignac number, because 1191045 - 2⁵ = 1191013 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3919 + ... + 4211.

It is an arithmetic number, because the mean of its divisors is an integer number (119952).

2^1191045 is an apocalyptic number.

1191045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1191045 is a deficient number, since it is larger than the sum of its proper divisors (728187).

1191045 is a wasteful number, since it uses less digits than its factorization.

1191045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572.

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 1191045 is about 1091.3500813213. The cubic root of 1191045 is about 106.0008603229. Note that the first 3 decimals are identical.

Adding to 1191045 its reverse (5401911), we get a palindrome (6592956).

The spelling of 1191045 in words is "one million, one hundred ninety-one thousand, forty-five".