1145689 has 2 divisors, whose sum is σ = 1145690. Its totient is φ = 1145688.

The previous prime is 1145659. The next prime is 1145693. The reversal of 1145689 is 9865411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 608400 + 537289 = 780^2 + 733^2 .

It is an emirp because it is prime and its reverse (9865411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1145689 - 2¹⁵ = 1112921 is a prime.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (1145659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572844 + 572845.

It is an arithmetic number, because the mean of its divisors is an integer number (572845).

2^1145689 is an apocalyptic number.

It is an amenable number.

1145689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1145689 is an equidigital number, since it uses as much as digits as its factorization.

1145689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 34.

The square root of 1145689 is about 1070.3686280903. The cubic root of 1145689 is about 104.6378757456.

The spelling of 1145689 in words is "one million, one hundred forty-five thousand, six hundred eighty-nine".