1145255889 has 8 divisors (see below), whose sum is σ = 1537994080. Its totient is φ = 758010816.

The previous prime is 1145255887. The next prime is 1145255893. The reversal of 1145255889 is 9885525411.

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

It is not a de Polignac number, because 1145255889 - 2¹ = 1145255887 is a prime.

It is a super-2 number, since 2×1145255889² = 2623222102578360642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1145255887) 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, 1372792 + ... + 1373625.

It is an arithmetic number, because the mean of its divisors is an integer number (192249260).

Almost surely, 2^1145255889 is an apocalyptic number.

It is an amenable number.

1145255889 is a deficient number, since it is larger than the sum of its proper divisors (392738191).

1145255889 is a wasteful number, since it uses less digits than its factorization.

1145255889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2746559.

The product of its digits is 576000, while the sum is 48.

The square root of 1145255889 is about 33841.6295263689. The cubic root of 1145255889 is about 1046.2468847658.

The spelling of 1145255889 in words is "one billion, one hundred forty-five million, two hundred fifty-five thousand, eight hundred eighty-nine".