1142678609 has 2 divisors, whose sum is σ = 1142678610. Its totient is φ = 1142678608.

The previous prime is 1142678599. The next prime is 1142678623. The reversal of 1142678609 is 9068762411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 889709584 + 252969025 = 29828^2 + 15905^2 .

It is a cyclic number.

It is not a de Polignac number, because 1142678609 - 2⁸ = 1142678353 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1142678609.

It is not a weakly prime, because it can be changed into another prime (1142677609) 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, 571339304 + 571339305.

It is an arithmetic number, because the mean of its divisors is an integer number (571339305).

Almost surely, 2^1142678609 is an apocalyptic number.

It is an amenable number.

1142678609 is a deficient number, since it is larger than the sum of its proper divisors (1).

1142678609 is an equidigital number, since it uses as much as digits as its factorization.

1142678609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 1142678609 is about 33803.5295346507. The cubic root of 1142678609 is about 1045.4614718173.

The spelling of 1142678609 in words is "one billion, one hundred forty-two million, six hundred seventy-eight thousand, six hundred nine".