1126991 has 2 divisors, whose sum is σ = 1126992. Its totient is φ = 1126990.

The previous prime is 1126973. The next prime is 1126999. The reversal of 1126991 is 1996211.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1126991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1126999) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 563495 + 563496.

It is an arithmetic number, because the mean of its divisors is an integer number (563496).

2^1126991 is an apocalyptic number.

1126991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1126991 is an equidigital number, since it uses as much as digits as its factorization.

1126991 is an evil number, because the sum of its binary digits is even.

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

The square root of 1126991 is about 1061.5983232843. The cubic root of 1126991 is about 104.0655097621.

The spelling of 1126991 in words is "one million, one hundred twenty-six thousand, nine hundred ninety-one".