1197391 has 4 divisors (see below), whose sum is σ = 1289512. Its totient is φ = 1105272.

The previous prime is 1197389. The next prime is 1197407. The reversal of 1197391 is 1937911.

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 1197391 - 2¹ = 1197389 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 (1192391) 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, 46041 + ... + 46066.

It is an arithmetic number, because the mean of its divisors is an integer number (322378).

2^1197391 is an apocalyptic number.

1197391 is a deficient number, since it is larger than the sum of its proper divisors (92121).

1197391 is an equidigital number, since it uses as much as digits as its factorization.

1197391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92120.

The product of its digits is 1701, while the sum is 31.

The square root of 1197391 is about 1094.2536269074. The cubic root of 1197391 is about 106.1887878096.

The spelling of 1197391 in words is "one million, one hundred ninety-seven thousand, three hundred ninety-one".