143640565 has 16 divisors (see below), whose sum is σ = 184826880. Its totient is φ = 106778880.

The previous prime is 143640557. The next prime is 143640587. The reversal of 143640565 is 565046341.

It is not a de Polignac number, because 143640565 - 2³ = 143640557 is a prime.

It is a super-2 number, since 2×143640565² = 41265223827038450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 143640565.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3981 + ... + 17410.

It is an arithmetic number, because the mean of its divisors is an integer number (11551680).

Almost surely, 2^143640565 is an apocalyptic number.

It is an amenable number.

143640565 is a deficient number, since it is larger than the sum of its proper divisors (41186315).

143640565 is a wasteful number, since it uses less digits than its factorization.

143640565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21492.

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 143640565 is about 11985.0141843888. The cubic root of 143640565 is about 523.7118107732.

The spelling of 143640565 in words is "one hundred forty-three million, six hundred forty thousand, five hundred sixty-five".