1143445965 has 16 divisors (see below), whose sum is σ = 1878960768. Its totient is φ = 593355456.

The previous prime is 1143445957. The next prime is 1143445967. The reversal of 1143445965 is 5695443411.

It is a happy number.

It is not a de Polignac number, because 1143445965 - 2³ = 1143445957 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143445967) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1029577 + ... + 1030686.

It is an arithmetic number, because the mean of its divisors is an integer number (117435048).

Almost surely, 2^1143445965 is an apocalyptic number.

1143445965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1143445965 is a deficient number, since it is larger than the sum of its proper divisors (735514803).

1143445965 is a wasteful number, since it uses less digits than its factorization.

1143445965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2060308.

The product of its digits is 259200, while the sum is 42.

The square root of 1143445965 is about 33814.8778646323. The cubic root of 1143445965 is about 1045.6954430070.

The spelling of 1143445965 in words is "one billion, one hundred forty-three million, four hundred forty-five thousand, nine hundred sixty-five".