1142440509 has 16 divisors (see below), whose sum is σ = 1756271232. Its totient is φ = 647044608.

The previous prime is 1142440501. The next prime is 1142440543. The reversal of 1142440509 is 9050442411.

It is not a de Polignac number, because 1142440509 - 2³ = 1142440501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142440501) 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 in 15 ways as a sum of consecutive naturals, for example, 238344 + ... + 243089.

It is an arithmetic number, because the mean of its divisors is an integer number (109766952).

Almost surely, 2^1142440509 is an apocalyptic number.

It is an amenable number.

1142440509 is a deficient number, since it is larger than the sum of its proper divisors (613830723).

1142440509 is a wasteful number, since it uses less digits than its factorization.

1142440509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481556.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 1142440509 is about 33800.0075295850. The cubic root of 1142440509 is about 1045.3888524865.

The spelling of 1142440509 in words is "one billion, one hundred forty-two million, four hundred forty thousand, five hundred nine".