1230689 has 2 divisors, whose sum is σ = 1230690. Its totient is φ = 1230688.

The previous prime is 1230667. The next prime is 1230727. The reversal of 1230689 is 9860321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1227664 + 3025 = 1108^2 + 55^2 .

It is a cyclic number.

It is not a de Polignac number, because 1230689 - 2⁸ = 1230433 is a prime.

It is not a weakly prime, because it can be changed into another prime (1230629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615344 + 615345.

It is an arithmetic number, because the mean of its divisors is an integer number (615345).

2^1230689 is an apocalyptic number.

It is an amenable number.

1230689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1230689 is an equidigital number, since it uses as much as digits as its factorization.

1230689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 1230689 is about 1109.3642323421. The cubic root of 1230689 is about 107.1641292790.

The spelling of 1230689 in words is "one million, two hundred thirty thousand, six hundred eighty-nine".