143442 has 24 divisors (see below), whose sum is σ = 335244. Its totient is φ = 44064.

The previous prime is 143419. The next prime is 143443. The reversal of 143442 is 244341.

It can be written as a sum of positive squares in 2 ways, for example, as 103041 + 40401 = 321^2 + 201^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a d-powerful number, because it can be written as 1 + 4⁶ + 4⁶ + 3⁴ + 4⁶ + 2¹⁷ .

It is a nialpdrome in base 11.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 143442.

It is not an unprimeable number, because it can be changed into a prime (143443) by changing a digit.

143442 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73 + ... + 540.

2¹⁴³⁴⁴² is an apocalyptic number.

143442 is an abundant number, since it is smaller than the sum of its proper divisors (191802).

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

143442 is a wasteful number, since it uses less digits than its factorization.

143442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634 (or 631 counting only the distinct ones).

The product of its digits is 384, while the sum is 18.

The square root of 143442 is about 378.7373760272. The cubic root of 143442 is about 52.3470377604.

Adding to 143442 its reverse (244341), we get a palindrome (387783).

It can be divided in two parts, 143 and 442, that added together give a palindrome (585).

The spelling of 143442 in words is "one hundred forty-three thousand, four hundred forty-two", and thus it is an iban number.