142211244 has 48 divisors (see below), whose sum is σ = 392313600. Its totient is φ = 39230016.

The previous prime is 142211203. The next prime is 142211249. The reversal of 142211244 is 442112241.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 142211244.

It is not an unprimeable number, because it can be changed into a prime (142211249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26754 + ... + 31625.

It is an arithmetic number, because the mean of its divisors is an integer number (8173200).

Almost surely, 2^142211244 is an apocalyptic number.

142211244 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

142211244 is an abundant number, since it is smaller than the sum of its proper divisors (250102356).

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

142211244 is a wasteful number, since it uses less digits than its factorization.

142211244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58422 (or 58420 counting only the distinct ones).

The product of its digits is 512, while the sum is 21.

The square root of 142211244 is about 11925.2355951570. The cubic root of 142211244 is about 521.9689210956.

Adding to 142211244 its reverse (442112241), we get a palindrome (584323485).

The spelling of 142211244 in words is "one hundred forty-two million, two hundred eleven thousand, two hundred forty-four".