142139712 has 224 divisors, whose sum is σ = 458809344. Its totient is φ = 38246400.

The previous prime is 142139707. The next prime is 142139713. The reversal of 142139712 is 217931241.

It is a self number, because there is not a number n which added to its sum of digits gives 142139712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142139713) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 851053 + ... + 851219.

It is an arithmetic number, because the mean of its divisors is an integer number (2048256).

Almost surely, 2^142139712 is an apocalyptic number.

142139712 is a gapful number since it is divisible by the number (12) 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 142139712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (229404672).

142139712 is an abundant number, since it is smaller than the sum of its proper divisors (316669632).

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

142139712 is a wasteful number, since it uses less digits than its factorization.

142139712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237 (or 227 counting only the distinct ones).

The product of its digits is 3024, while the sum is 30.

The square root of 142139712 is about 11922.2360318860. The cubic root of 142139712 is about 521.8813899417.

The spelling of 142139712 in words is "one hundred forty-two million, one hundred thirty-nine thousand, seven hundred twelve".