1129897 has 2 divisors, whose sum is σ = 1129898. Its totient is φ = 1129896.

The previous prime is 1129889. The next prime is 1129951. The reversal of 1129897 is 7989211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 811801 + 318096 = 901^2 + 564^2 .

It is a cyclic number.

It is not a de Polignac number, because 1129897 - 2³ = 1129889 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1129847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564948 + 564949.

It is an arithmetic number, because the mean of its divisors is an integer number (564949).

2^1129897 is an apocalyptic number.

It is an amenable number.

1129897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1129897 is an equidigital number, since it uses as much as digits as its factorization.

1129897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 37.

The square root of 1129897 is about 1062.9661330447. The cubic root of 1129897 is about 104.1548789506.

The spelling of 1129897 in words is "one million, one hundred twenty-nine thousand, eight hundred ninety-seven".