212400142 has 16 divisors (see below), whose sum is σ = 339811200. Its totient is φ = 99221248.

The previous prime is 212400113. The next prime is 212400157. The reversal of 212400142 is 241004212.

212400142 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×212400142² = 90227640643240328, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 18142 + ... + 27457.

It is an arithmetic number, because the mean of its divisors is an integer number (21238200).

Almost surely, 2^212400142 is an apocalyptic number.

212400142 is a deficient number, since it is larger than the sum of its proper divisors (127411058).

212400142 is a wasteful number, since it uses less digits than its factorization.

212400142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45755.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 212400142 is about 14573.9542334948. The cubic root of 212400142 is about 596.6481077145.

Adding to 212400142 its reverse (241004212), we get a palindrome (453404354).

The spelling of 212400142 in words is "two hundred twelve million, four hundred thousand, one hundred forty-two".