143042221 has 12 divisors (see below), whose sum is σ = 173632032. Its totient is φ = 117275928.

The previous prime is 143042213. The next prime is 143042227. The reversal of 143042221 is 122240341.

It is not a de Polignac number, because 143042221 - 2³ = 143042213 is a prime.

It is a super-2 number, since 2×143042221² = 40922153977225682, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143042227) 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 11 ways as a sum of consecutive naturals, for example, 62335 + ... + 64588.

It is an arithmetic number, because the mean of its divisors is an integer number (14469336).

Almost surely, 2^143042221 is an apocalyptic number.

It is an amenable number.

143042221 is a deficient number, since it is larger than the sum of its proper divisors (30589811).

143042221 is a wasteful number, since it uses less digits than its factorization.

143042221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126960 (or 126953 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 143042221 is about 11960.0259615103. The cubic root of 143042221 is about 522.9836136555.

Adding to 143042221 its reverse (122240341), we get a palindrome (265282562).

The spelling of 143042221 in words is "one hundred forty-three million, forty-two thousand, two hundred twenty-one".