143145909 has 24 divisors (see below), whose sum is σ = 210501720. Its totient is φ = 93722112.

The previous prime is 143145889. The next prime is 143145911. The reversal of 143145909 is 909541341.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 68807025 + 74338884 = 8295^2 + 8622^2 .

It is not a de Polignac number, because 143145909 - 2¹⁵ = 143113141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143145949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 138057 + ... + 139089.

It is an arithmetic number, because the mean of its divisors is an integer number (8770905).

Almost surely, 2^143145909 is an apocalyptic number.

It is an amenable number.

143145909 is a deficient number, since it is larger than the sum of its proper divisors (67355811).

143145909 is a wasteful number, since it uses less digits than its factorization.

143145909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1301 (or 1298 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 143145909 is about 11964.3599494499. The cubic root of 143145909 is about 523.1099493792.

The spelling of 143145909 in words is "one hundred forty-three million, one hundred forty-five thousand, nine hundred nine".