143138021 has 8 divisors (see below), whose sum is σ = 154766304. Its totient is φ = 131598000.

The previous prime is 143137979. The next prime is 143138029. The reversal of 143138021 is 120831341.

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 143138021 - 2⁶ = 143137957 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 (143138029) 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, 18671 + ... + 25196.

It is an arithmetic number, because the mean of its divisors is an integer number (19345788).

Almost surely, 2^143138021 is an apocalyptic number.

It is an amenable number.

143138021 is a deficient number, since it is larger than the sum of its proper divisors (11628283).

143138021 is a wasteful number, since it uses less digits than its factorization.

143138021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44131.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 143138021 is about 11964.0302991927. The cubic root of 143138021 is about 523.1003406122.

Adding to 143138021 its reverse (120831341), we get a palindrome (263969362).

The spelling of 143138021 in words is "one hundred forty-three million, one hundred thirty-eight thousand, twenty-one".