1242000769 has 2 divisors, whose sum is σ = 1242000770. Its totient is φ = 1242000768.

The previous prime is 1242000761. The next prime is 1242000779. The reversal of 1242000769 is 9670002421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1055405169 + 186595600 = 32487^2 + 13660^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242000769 - 2³ = 1242000761 is a prime.

It is a super-2 number, since 2×1242000769² = 3085131820393182722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1242000769.

It is not a weakly prime, because it can be changed into another prime (1242000761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621000384 + 621000385.

It is an arithmetic number, because the mean of its divisors is an integer number (621000385).

Almost surely, 2^1242000769 is an apocalyptic number.

It is an amenable number.

1242000769 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242000769 is an equidigital number, since it uses as much as digits as its factorization.

1242000769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 1242000769 is about 35242.0312836817. The cubic root of 1242000769 is about 1074.9145831537.

The spelling of 1242000769 in words is "one billion, two hundred forty-two million, seven hundred sixty-nine", and thus it is an aban number.