1260191 has 2 divisors, whose sum is σ = 1260192. Its totient is φ = 1260190.

The previous prime is 1260169. The next prime is 1260223. The reversal of 1260191 is 1910621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1260191 - 2¹⁴ = 1243807 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1260121) 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 as a sum of consecutive naturals, namely, 630095 + 630096.

It is an arithmetic number, because the mean of its divisors is an integer number (630096).

2^1260191 is an apocalyptic number.

1260191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1260191 is an equidigital number, since it uses as much as digits as its factorization.

1260191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 1260191 is about 1122.5822909702. The cubic root of 1260191 is about 108.0136871085.

The spelling of 1260191 in words is "one million, two hundred sixty thousand, one hundred ninety-one".