142439544 has 96 divisors (see below), whose sum is σ = 428937600. Its totient is φ = 42405120.

The previous prime is 142439533. The next prime is 142439569. The reversal of 142439544 is 445934241.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 142439499 and 142439508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26562 + ... + 31470.

It is an arithmetic number, because the mean of its divisors is an integer number (4468100).

Almost surely, 2^142439544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 142439544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214468800).

142439544 is an abundant number, since it is smaller than the sum of its proper divisors (286498056).

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

142439544 is a wasteful number, since it uses less digits than its factorization.

142439544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4965 (or 4958 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 142439544 is about 11934.8038944928. The cubic root of 142439544 is about 522.2480874737.

The spelling of 142439544 in words is "one hundred forty-two million, four hundred thirty-nine thousand, five hundred forty-four".