142221232 has 20 divisors (see below), whose sum is σ = 290057080. Its totient is φ = 67367808.

The previous prime is 142221227. The next prime is 142221257. The reversal of 142221232 is 232122241.

142221232 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (19).

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, 233613 + ... + 234220.

It is an arithmetic number, because the mean of its divisors is an integer number (14502854).

Almost surely, 2^142221232 is an apocalyptic number.

It is an amenable number.

142221232 is an abundant number, since it is smaller than the sum of its proper divisors (147835848).

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

142221232 is a wasteful number, since it uses less digits than its factorization.

142221232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467860 (or 467854 counting only the distinct ones).

The product of its digits is 384, while the sum is 19.

The square root of 142221232 is about 11925.6543635978. The cubic root of 142221232 is about 521.9811407190.

Adding to 142221232 its reverse (232122241), we get a palindrome (374343473).

The spelling of 142221232 in words is "one hundred forty-two million, two hundred twenty-one thousand, two hundred thirty-two".