142321424 has 40 divisors (see below), whose sum is σ = 328848000. Its totient is φ = 58341888.

The previous prime is 142321397. The next prime is 142321429. The reversal of 142321424 is 424123241.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a self number, because there is not a number n which added to its sum of digits gives 142321424.

It is not an unprimeable number, because it can be changed into a prime (142321429) 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 7 ways as a sum of consecutive naturals, for example, 25049 + ... + 30200.

It is an arithmetic number, because the mean of its divisors is an integer number (8221200).

Almost surely, 2^142321424 is an apocalyptic number.

142321424 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

142321424 is an abundant number, since it is smaller than the sum of its proper divisors (186526576).

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

142321424 is a wasteful number, since it uses less digits than its factorization.

142321424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55287 (or 55281 counting only the distinct ones).

The product of its digits is 1536, while the sum is 23.

The square root of 142321424 is about 11929.8543159588. The cubic root of 142321424 is about 522.1036870212.

Adding to 142321424 its reverse (424123241), we get a palindrome (566444665).

The spelling of 142321424 in words is "one hundred forty-two million, three hundred twenty-one thousand, four hundred twenty-four".