1380191 has 4 divisors (see below), whose sum is σ = 1385352. Its totient is φ = 1375032.

The previous prime is 1380163. The next prime is 1380199. The reversal of 1380191 is 1910831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1910831 = 13 ⋅146987.

It is a cyclic number.

It is not a de Polignac number, because 1380191 - 2¹⁰ = 1379167 is a prime.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1380199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2156 + ... + 2721.

It is an arithmetic number, because the mean of its divisors is an integer number (346338).

2^1380191 is an apocalyptic number.

1380191 is a deficient number, since it is larger than the sum of its proper divisors (5161).

1380191 is an equidigital number, since it uses as much as digits as its factorization.

1380191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5160.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 1380191 is about 1174.8153046330. The cubic root of 1380191 is about 111.3387643217.

The spelling of 1380191 in words is "one million, three hundred eighty thousand, one hundred ninety-one".