142204220 has 24 divisors (see below), whose sum is σ = 299545008. Its totient is φ = 56707200.

The previous prime is 142204207. The next prime is 142204243. The reversal of 142204220 is 22402241.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4121 + ... + 17360.

It is an arithmetic number, because the mean of its divisors is an integer number (12481042).

Almost surely, 2^142204220 is an apocalyptic number.

142204220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142204220 is an abundant number, since it is smaller than the sum of its proper divisors (157340788).

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

142204220 is a wasteful number, since it uses less digits than its factorization.

142204220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21821 (or 21819 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 142204220 is about 11924.9410900012. The cubic root of 142204220 is about 521.9603273774.

Adding to 142204220 its reverse (22402241), we get a palindrome (164606461).

The spelling of 142204220 in words is "one hundred forty-two million, two hundred four thousand, two hundred twenty".