143420999 has 8 divisors (see below), whose sum is σ = 145351248. Its totient is φ = 141500160.

The previous prime is 143420971. The next prime is 143421007. The reversal of 143420999 is 999024341.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143420999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143420899) 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 7 ways as a sum of consecutive naturals, for example, 31529 + ... + 35789.

It is an arithmetic number, because the mean of its divisors is an integer number (18168906).

Almost surely, 2^143420999 is an apocalyptic number.

143420999 is a deficient number, since it is larger than the sum of its proper divisors (1930249).

143420999 is an equidigital number, since it uses as much as digits as its factorization.

143420999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4705.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 143420999 is about 11975.8506587215. The cubic root of 143420999 is about 523.4448296750. Note that the first 3 decimals are identical.

The spelling of 143420999 in words is "one hundred forty-three million, four hundred twenty thousand, nine hundred ninety-nine".