143421442 has 8 divisors (see below), whose sum is σ = 215188236. Its totient is φ = 71692032.

The previous prime is 143421413. The next prime is 143421457. The reversal of 143421442 is 244124341.

It can be written as a sum of positive squares in 2 ways, for example, as 142539721 + 881721 = 11939^2 + 939^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4138 + ... + 17434.

Almost surely, 2^143421442 is an apocalyptic number.

143421442 is a deficient number, since it is larger than the sum of its proper divisors (71766794).

143421442 is a wasteful number, since it uses less digits than its factorization.

143421442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18692.

The product of its digits is 3072, while the sum is 25.

The square root of 143421442 is about 11975.8691542618. The cubic root of 143421442 is about 523.4453686148.

Adding to 143421442 its reverse (244124341), we get a palindrome (387545783).

It can be divided in two parts, 143 and 421442, that multiplied together give a palindrome (60266206).

The spelling of 143421442 in words is "one hundred forty-three million, four hundred twenty-one thousand, four hundred forty-two".