1142645489 has 2 divisors, whose sum is σ = 1142645490. Its totient is φ = 1142645488.

The previous prime is 1142645477. The next prime is 1142645509. The reversal of 1142645489 is 9845462411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 979189264 + 163456225 = 31292^2 + 12785^2 .

It is a cyclic number.

It is not a de Polignac number, because 1142645489 - 2⁸ = 1142645233 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1142645419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571322744 + 571322745.

It is an arithmetic number, because the mean of its divisors is an integer number (571322745).

Almost surely, 2^1142645489 is an apocalyptic number.

It is an amenable number.

1142645489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1142645489 is an equidigital number, since it uses as much as digits as its factorization.

1142645489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 276480, while the sum is 44.

The square root of 1142645489 is about 33803.0396414287. The cubic root of 1142645489 is about 1045.4513709840.

The spelling of 1142645489 in words is "one billion, one hundred forty-two million, six hundred forty-five thousand, four hundred eighty-nine".