143421000 has 64 divisors (see below), whose sum is σ = 447482880. Its totient is φ = 38244800.

The previous prime is 143420971. The next prime is 143421007. The reversal of 143421000 is 124341.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (143421007) 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 15 ways as a sum of consecutive naturals, for example, 20904 + ... + 26903.

It is an arithmetic number, because the mean of its divisors is an integer number (6991920).

Almost surely, 2^143421000 is an apocalyptic number.

143421000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

143421000 is an abundant number, since it is smaller than the sum of its proper divisors (304061880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

143421000 is a wasteful number, since it uses less digits than its factorization.

143421000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47831 (or 47817 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 143421000 is about 11975.8507004722. The cubic root of 143421000 is about 523.4448308916. Note that the first 3 decimals are identical.

Adding to 143421000 its reverse (124341), we get a palindrome (143545341).

The spelling of 143421000 in words is "one hundred forty-three million, four hundred twenty-one thousand".