212842042 has 32 divisors (see below), whose sum is σ = 369388800. Its totient is φ = 90097920.

The previous prime is 212842039. The next prime is 212842043. The reversal of 212842042 is 240248212.

It is a junction number, because it is equal to n+sod(n) for n = 212841998 and 212842016.

It is not an unprimeable number, because it can be changed into a prime (212842043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 671268 + ... + 671584.

It is an arithmetic number, because the mean of its divisors is an integer number (11543400).

Almost surely, 2^212842042 is an apocalyptic number.

212842042 is a deficient number, since it is larger than the sum of its proper divisors (156546758).

212842042 is a wasteful number, since it uses less digits than its factorization.

212842042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766.

The product of its (nonzero) digits is 2048, while the sum is 25.

The square root of 212842042 is about 14589.1069637590. The cubic root of 212842042 is about 597.0615979620.

It can be divided in two parts, 2128 and 42042, that multiplied together give a triangular number (89465376 = T₁₃₃₇₆).

The spelling of 212842042 in words is "two hundred twelve million, eight hundred forty-two thousand, forty-two".