143675721 has 64 divisors (see below), whose sum is σ = 260789760. Its totient is φ = 76308480.

The previous prime is 143675717. The next prime is 143675723. The reversal of 143675721 is 127576341.

It is a happy number.

It is not a de Polignac number, because 143675721 - 2² = 143675717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (143675723) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 311431 + ... + 311891.

It is an arithmetic number, because the mean of its divisors is an integer number (4074840).

Almost surely, 2^143675721 is an apocalyptic number.

It is an amenable number.

143675721 is a deficient number, since it is larger than the sum of its proper divisors (117114039).

143675721 is a wasteful number, since it uses less digits than its factorization.

143675721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591 (or 585 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 143675721 is about 11986.4807595891. The cubic root of 143675721 is about 523.7545334088.

The spelling of 143675721 in words is "one hundred forty-three million, six hundred seventy-five thousand, seven hundred twenty-one".