143899121 has 4 divisors (see below), whose sum is σ = 143954544. Its totient is φ = 143843700.

The previous prime is 143899111. The next prime is 143899123. The reversal of 143899121 is 121998341.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 143899121 - 2²⁶ = 76790257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (143899123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23615 + ... + 29076.

It is an arithmetic number, because the mean of its divisors is an integer number (35988636).

Almost surely, 2^143899121 is an apocalyptic number.

It is an amenable number.

143899121 is a deficient number, since it is larger than the sum of its proper divisors (55423).

143899121 is an equidigital number, since it uses as much as digits as its factorization.

143899121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55422.

The product of its digits is 15552, while the sum is 38.

The square root of 143899121 is about 11995.7959719228. The cubic root of 143899121 is about 524.0258531327.

The spelling of 143899121 in words is "one hundred forty-three million, eight hundred ninety-nine thousand, one hundred twenty-one".