1120391 has 2 divisors, whose sum is σ = 1120392. Its totient is φ = 1120390.

The previous prime is 1120369. The next prime is 1120423. The reversal of 1120391 is 1930211.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1120391 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1120321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560195 + 560196.

It is an arithmetic number, because the mean of its divisors is an integer number (560196).

2^1120391 is an apocalyptic number.

1120391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1120391 is an equidigital number, since it uses as much as digits as its factorization.

1120391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 1120391 is about 1058.4852384422. The cubic root of 1120391 is about 103.8619655429.

It can be divided in two parts, 11 and 20391, that added together give a palindrome (20402).

The spelling of 1120391 in words is "one million, one hundred twenty thousand, three hundred ninety-one".