64001143 has 8 divisors (see below), whose sum is σ = 66158720. Its totient is φ = 61849440.

The previous prime is 64001137. The next prime is 64001159. The reversal of 64001143 is 34110046.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64001143 is a prime.

It is a super-2 number, since 2×64001143² = 8192292610612898, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64001143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64001543) 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, 37513 + ... + 39181.

It is an arithmetic number, because the mean of its divisors is an integer number (8269840).

Almost surely, 2^64001143 is an apocalyptic number.

64001143 is a deficient number, since it is larger than the sum of its proper divisors (2157577).

64001143 is a wasteful number, since it uses less digits than its factorization.

64001143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2937.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 64001143 is about 8000.0714371810. The cubic root of 64001143 is about 400.0023812358.

Adding to 64001143 its reverse (34110046), we get a palindrome (98111189).

The spelling of 64001143 in words is "sixty-four million, one thousand, one hundred forty-three".