1186489 has 2 divisors, whose sum is σ = 1186490. Its totient is φ = 1186488.

The previous prime is 1186441. The next prime is 1186517. The reversal of 1186489 is 9846811.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 672400 + 514089 = 820^2 + 717^2 .

It is a cyclic number.

It is not a de Polignac number, because 1186489 - 2¹³ = 1178297 is a prime.

It is a super-2 number, since 2×1186489² = 2815512294242, which contains 22 as substring.

1186489 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1186439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 593244 + 593245.

It is an arithmetic number, because the mean of its divisors is an integer number (593245).

2^1186489 is an apocalyptic number.

It is an amenable number.

1186489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1186489 is an equidigital number, since it uses as much as digits as its factorization.

1186489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 37.

The square root of 1186489 is about 1089.2607584963. The cubic root of 1186489 is about 105.8655290202.

The spelling of 1186489 in words is "one million, one hundred eighty-six thousand, four hundred eighty-nine".