143421225 has 12 divisors (see below), whose sum is σ = 237123216. Its totient is φ = 76491280.

The previous prime is 143421209. The next prime is 143421247. The reversal of 143421225 is 522124341.

It is not a de Polignac number, because 143421225 - 2⁴ = 143421209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 143421195 and 143421204.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 956067 + ... + 956216.

It is an arithmetic number, because the mean of its divisors is an integer number (19760268).

Almost surely, 2^143421225 is an apocalyptic number.

143421225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

143421225 is a deficient number, since it is larger than the sum of its proper divisors (93701991).

143421225 is a wasteful number, since it uses less digits than its factorization.

143421225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1912296 (or 1912291 counting only the distinct ones).

The product of its digits is 1920, while the sum is 24.

The square root of 143421225 is about 11975.8600943732. The cubic root of 143421225 is about 523.4451046196.

Adding to 143421225 its reverse (522124341), we get a palindrome (665545566).

The spelling of 143421225 in words is "one hundred forty-three million, four hundred twenty-one thousand, two hundred twenty-five".