1240769 has 2 divisors, whose sum is σ = 1240770. Its totient is φ = 1240768.

The previous prime is 1240763. The next prime is 1240777. The reversal of 1240769 is 9670421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1236544 + 4225 = 1112^2 + 65^2 .

It is an emirp because it is prime and its reverse (9670421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1240769 - 2²⁰ = 192193 is a prime.

It is a super-2 number, since 2×1240769² = 3079015422722, which contains 22 as substring.

It is a plaindrome in base 13.

It is not a weakly prime, because it can be changed into another prime (1240763) 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, 620384 + 620385.

It is an arithmetic number, because the mean of its divisors is an integer number (620385).

2^1240769 is an apocalyptic number.

It is an amenable number.

1240769 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240769 is an equidigital number, since it uses as much as digits as its factorization.

1240769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 1240769 is about 1113.8981102417. The cubic root of 1240769 is about 107.4559112516.

The spelling of 1240769 in words is "one million, two hundred forty thousand, seven hundred sixty-nine".