142421552 has 80 divisors (see below), whose sum is σ = 351435840. Its totient is φ = 54383616.

The previous prime is 142421551. The next prime is 142421557. The reversal of 142421552 is 255124241.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (142421551) 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 15 ways as a sum of consecutive naturals, for example, 40538 + ... + 43910.

It is an arithmetic number, because the mean of its divisors is an integer number (4392948).

Almost surely, 2^142421552 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 142421552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (175717920).

142421552 is an abundant number, since it is smaller than the sum of its proper divisors (209014288).

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

142421552 is a wasteful number, since it uses less digits than its factorization.

142421552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3430 (or 3424 counting only the distinct ones).

The product of its digits is 3200, while the sum is 26.

The square root of 142421552 is about 11934.0501088273. The cubic root of 142421552 is about 522.2260975988.

Adding to 142421552 its reverse (255124241), we get a palindrome (397545793).

The spelling of 142421552 in words is "one hundred forty-two million, four hundred twenty-one thousand, five hundred fifty-two".