1162991 has 2 divisors, whose sum is σ = 1162992. Its totient is φ = 1162990.

The previous prime is 1162981. The next prime is 1163003. The reversal of 1162991 is 1992611.

It is a weak prime.

It is an emirp because it is prime and its reverse (1992611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1162991 - 2⁶ = 1162927 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 (1162901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 581495 + 581496.

It is an arithmetic number, because the mean of its divisors is an integer number (581496).

2^1162991 is an apocalyptic number.

1162991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1162991 is an equidigital number, since it uses as much as digits as its factorization.

1162991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 972, while the sum is 29.

The square root of 1162991 is about 1078.4206044026. The cubic root of 1162991 is about 105.1619873072.

The spelling of 1162991 in words is "one million, one hundred sixty-two thousand, nine hundred ninety-one".