1145421965 has 16 divisors (see below), whose sum is σ = 1435235328. Its totient is φ = 875905536.

The previous prime is 1145421943. The next prime is 1145421983. The reversal of 1145421965 is 5691245411.

It is a cyclic number.

It is not a de Polignac number, because 1145421965 - 2²⁰ = 1144373389 is a prime.

It is a super-2 number, since 2×1145421965² = 2623982955808922450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 251549 + ... + 256061.

It is an arithmetic number, because the mean of its divisors is an integer number (89702208).

Almost surely, 2^1145421965 is an apocalyptic number.

It is an amenable number.

1145421965 is a deficient number, since it is larger than the sum of its proper divisors (289813363).

1145421965 is a wasteful number, since it uses less digits than its factorization.

1145421965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6748.

The product of its digits is 43200, while the sum is 38.

The square root of 1145421965 is about 33844.0831608717. The cubic root of 1145421965 is about 1046.2974551525.

The spelling of 1145421965 in words is "one billion, one hundred forty-five million, four hundred twenty-one thousand, nine hundred sixty-five".