143399385 has 24 divisors (see below), whose sum is σ = 249377544. Its totient is φ = 76227840.

The previous prime is 143399371. The next prime is 143399387. The reversal of 143399385 is 583993341.

It can be written as a sum of positive squares in 4 ways, for example, as 46656 + 143352729 = 216^2 + 11973^2 .

It is not a de Polignac number, because 143399385 - 2⁷ = 143399257 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 143399385.

It is not an unprimeable number, because it can be changed into a prime (143399387) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8995 + ... + 19175.

It is an arithmetic number, because the mean of its divisors is an integer number (10390731).

Almost surely, 2^143399385 is an apocalyptic number.

143399385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

143399385 is a deficient number, since it is larger than the sum of its proper divisors (105978159).

143399385 is a wasteful number, since it uses less digits than its factorization.

143399385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10505 (or 10502 counting only the distinct ones).

The product of its digits is 349920, while the sum is 45.

The square root of 143399385 is about 11974.9482253578. The cubic root of 143399385 is about 523.4185334213.

The spelling of 143399385 in words is "one hundred forty-three million, three hundred ninety-nine thousand, three hundred eighty-five".