142221140 has 12 divisors (see below), whose sum is σ = 298664436. Its totient is φ = 56888448.

The previous prime is 142221139. The next prime is 142221173. The reversal of 142221140 is 41122241.

142221140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 108534724 + 33686416 = 10418^2 + 5804^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3555509 + ... + 3555548.

It is an arithmetic number, because the mean of its divisors is an integer number (24888703).

Almost surely, 2^142221140 is an apocalyptic number.

142221140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142221140 is an abundant number, since it is smaller than the sum of its proper divisors (156443296).

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

142221140 is a wasteful number, since it uses less digits than its factorization.

142221140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7111066 (or 7111064 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 142221140 is about 11925.6505063665. The cubic root of 142221140 is about 521.9810281660.

Adding to 142221140 its reverse (41122241), we get a palindrome (183343381).

The spelling of 142221140 in words is "one hundred forty-two million, two hundred twenty-one thousand, one hundred forty".