142021500 has 96 divisors (see below), whose sum is σ = 419555136. Its totient is φ = 37324800.

The previous prime is 142021493. The next prime is 142021531. The reversal of 142021500 is 5120241.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 142021500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 108852 + ... + 110148.

It is an arithmetic number, because the mean of its divisors is an integer number (4370366).

Almost surely, 2^142021500 is an apocalyptic number.

142021500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 142021500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209777568).

142021500 is an abundant number, since it is smaller than the sum of its proper divisors (277533636).

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

142021500 is a wasteful number, since it uses less digits than its factorization.

142021500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1392 (or 1380 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 142021500 is about 11917.2773736286. The cubic root of 142021500 is about 521.7366737505.

Adding to 142021500 its reverse (5120241), we get a palindrome (147141741).

The spelling of 142021500 in words is "one hundred forty-two million, twenty-one thousand, five hundred".