1197591 has 4 divisors (see below), whose sum is σ = 1596792. Its totient is φ = 798392.

The previous prime is 1197577. The next prime is 1197601. The reversal of 1197591 is 1957911.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1197591 - 2⁶ = 1197527 is a prime.

It is a D-number.

1197591 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1197571) 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, 199596 + ... + 199601.

It is an arithmetic number, because the mean of its divisors is an integer number (399198).

2^1197591 is an apocalyptic number.

1197591 is a deficient number, since it is larger than the sum of its proper divisors (399201).

1197591 is an equidigital number, since it uses as much as digits as its factorization.

1197591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399200.

The product of its digits is 2835, while the sum is 33.

The square root of 1197591 is about 1094.3450095834. The cubic root of 1197591 is about 106.1946997117.

The spelling of 1197591 in words is "one million, one hundred ninety-seven thousand, five hundred ninety-one".