1145642489 has 8 divisors (see below), whose sum is σ = 1204869120. Its totient is φ = 1087200576.

The previous prime is 1145642467. The next prime is 1145642497. The reversal of 1145642489 is 9842465411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1145642489 - 2¹² = 1145638393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1145642689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193184 + ... + 199025.

It is an arithmetic number, because the mean of its divisors is an integer number (150608640).

Almost surely, 2^1145642489 is an apocalyptic number.

It is an amenable number.

1145642489 is a deficient number, since it is larger than the sum of its proper divisors (59226631).

1145642489 is a wasteful number, since it uses less digits than its factorization.

1145642489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392359.

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

The square root of 1145642489 is about 33847.3409443046. The cubic root of 1145642489 is about 1046.3645974811.

The spelling of 1145642489 in words is "one billion, one hundred forty-five million, six hundred forty-two thousand, four hundred eighty-nine".