1230769 has 2 divisors, whose sum is σ = 1230770. Its totient is φ = 1230768.

The previous prime is 1230751. The next prime is 1230791. The reversal of 1230769 is 9670321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 788544 + 442225 = 888^2 + 665^2 .

It is an emirp because it is prime and its reverse (9670321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1230769 - 2¹⁹ = 706481 is a prime.

It is a super-2 number, since 2×1230769² = 3029584662722, which contains 22 as substring.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (1230739) 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, 615384 + 615385.

It is an arithmetic number, because the mean of its divisors is an integer number (615385).

2^1230769 is an apocalyptic number.

It is an amenable number.

1230769 is a deficient number, since it is larger than the sum of its proper divisors (1).

1230769 is an equidigital number, since it uses as much as digits as its factorization.

1230769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 1230769 is about 1109.4002884442. The cubic root of 1230769 is about 107.1664512695.

The spelling of 1230769 in words is "one million, two hundred thirty thousand, seven hundred sixty-nine".