142444 has 12 divisors (see below), whose sum is σ = 252000. Its totient is φ = 70448.

The previous prime is 142433. The next prime is 142453. The reversal of 142444 is 444241.

It is a nude number because it is divisible by every one of its digits.

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, 477 + ... + 715.

It is an arithmetic number, because the mean of its divisors is an integer number (21000).

2¹⁴²⁴⁴⁴ is an apocalyptic number.

142444 is the 239-th heptagonal number.

It is an amenable number.

142444 is a deficient number, since it is larger than the sum of its proper divisors (109556).

142444 is a wasteful number, since it uses less digits than its factorization.

142444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392 (or 390 counting only the distinct ones).

The product of its digits is 512, while the sum is 19.

The square root of 142444 is about 377.4175406629. The cubic root of 142444 is about 52.2253533324.

Adding to 142444 its reverse (444241), we get a palindrome (586685).

The spelling of 142444 in words is "one hundred forty-two thousand, four hundred forty-four", and thus it is an iban number.