142155244 has 48 divisors (see below), whose sum is σ = 313238016. Its totient is φ = 54835200.

The previous prime is 142155239. The next prime is 142155257. The reversal of 142155244 is 442551241.

It is a super-2 number, since 2×142155244² = 40416226793399072, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29484 + ... + 33964.

It is an arithmetic number, because the mean of its divisors is an integer number (6525792).

Almost surely, 2^142155244 is an apocalyptic number.

142155244 is a gapful number since it is divisible by the number (14) 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 142155244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156619008).

142155244 is an abundant number, since it is smaller than the sum of its proper divisors (171082772).

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

142155244 is a wasteful number, since it uses less digits than its factorization.

142155244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4606 (or 4604 counting only the distinct ones).

The product of its digits is 6400, while the sum is 28.

The square root of 142155244 is about 11922.8874019677. The cubic root of 142155244 is about 521.9003983910.

It can be divided in two parts, 1421 and 55244, that added together give a palindrome (56665).

The spelling of 142155244 in words is "one hundred forty-two million, one hundred fifty-five thousand, two hundred forty-four".