142782138 has 36 divisors (see below), whose sum is σ = 320642010. Its totient is φ = 45865008.

The previous prime is 142782119. The next prime is 142782139. The reversal of 142782138 is 831287241.

It can be written as a sum of positive squares in only one way, i.e., 120626289 + 22155849 = 10983^2 + 4707^2 .

It is not an unprimeable number, because it can be changed into a prime (142782139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 272745 + ... + 273267.

Almost surely, 2^142782138 is an apocalyptic number.

142782138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 142782138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160321005).

142782138 is an abundant number, since it is smaller than the sum of its proper divisors (177859872).

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

142782138 is an equidigital number, since it uses as much as digits as its factorization.

142782138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083 (or 557 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 142782138 is about 11949.1480031005. The cubic root of 142782138 is about 522.6664539912. Note that the first 3 decimals are identical.

The spelling of 142782138 in words is "one hundred forty-two million, seven hundred eighty-two thousand, one hundred thirty-eight".