1140991 has 2 divisors, whose sum is σ = 1140992. Its totient is φ = 1140990.

The previous prime is 1140983. The next prime is 1141009. The reversal of 1140991 is 1990411.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1140991 - 2³ = 1140983 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1140901) 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, 570495 + 570496.

It is an arithmetic number, because the mean of its divisors is an integer number (570496).

2^1140991 is an apocalyptic number.

1140991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1140991 is an equidigital number, since it uses as much as digits as its factorization.

1140991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 25.

The square root of 1140991 is about 1068.1718026610. The cubic root of 1140991 is about 104.4946541529.

The spelling of 1140991 in words is "one million, one hundred forty thousand, nine hundred ninety-one".