212785142 has 16 divisors (see below), whose sum is σ = 342318960. Its totient is φ = 98890272.

The previous prime is 212785129. The next prime is 212785159. The reversal of 212785142 is 241587212.

It is a junction number, because it is equal to n+sod(n) for n = 212785099 and 212785108.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50813 + ... + 54840.

It is an arithmetic number, because the mean of its divisors is an integer number (21394935).

Almost surely, 2^212785142 is an apocalyptic number.

212785142 is a deficient number, since it is larger than the sum of its proper divisors (129533818).

212785142 is a wasteful number, since it uses less digits than its factorization.

212785142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105727.

The product of its digits is 8960, while the sum is 32.

The square root of 212785142 is about 14587.1567483180. The cubic root of 212785142 is about 597.0083881851.

The spelling of 212785142 in words is "two hundred twelve million, seven hundred eighty-five thousand, one hundred forty-two".