1129889 has 2 divisors, whose sum is σ = 1129890. Its totient is φ = 1129888.

The previous prime is 1129861. The next prime is 1129897. The reversal of 1129889 is 9889211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 667489 + 462400 = 817^2 + 680^2 .

It is a cyclic number.

It is not a de Polignac number, because 1129889 - 2¹² = 1125793 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1129819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564944 + 564945.

It is an arithmetic number, because the mean of its divisors is an integer number (564945).

2^1129889 is an apocalyptic number.

It is an amenable number.

1129889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1129889 is an equidigital number, since it uses as much as digits as its factorization.

1129889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 38.

The square root of 1129889 is about 1062.9623699831. The cubic root of 1129889 is about 104.1546331344.

It can be divided in two parts, 112 and 9889, that added together give a palindrome (10001).

The spelling of 1129889 in words is "one million, one hundred twenty-nine thousand, eight hundred eighty-nine".