143665121 has 8 divisors (see below), whose sum is σ = 145664064. Its totient is φ = 141678000.

The previous prime is 143665111. The next prime is 143665133. The reversal of 143665121 is 121566341.

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 not a de Polignac number, because 143665121 - 2⁶ = 143665057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (143665111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23075 + ... + 28631.

It is an arithmetic number, because the mean of its divisors is an integer number (18208008).

Almost surely, 2^143665121 is an apocalyptic number.

It is an amenable number.

143665121 is a deficient number, since it is larger than the sum of its proper divisors (1998943).

143665121 is a wasteful number, since it uses less digits than its factorization.

143665121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5911.

The product of its digits is 4320, while the sum is 29.

The square root of 143665121 is about 11986.0385866224. The cubic root of 143665121 is about 523.7416527018.

The spelling of 143665121 in words is "one hundred forty-three million, six hundred sixty-five thousand, one hundred twenty-one".