212145042 has 8 divisors (see below), whose sum is σ = 424290096. Its totient is φ = 70715012.

The previous prime is 212145001. The next prime is 212145047. The reversal of 212145042 is 240541212.

212145042 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

212145042 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (212145047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17678748 + ... + 17678759.

It is an arithmetic number, because the mean of its divisors is an integer number (53036262).

Almost surely, 2^212145042 is an apocalyptic number.

212145042 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

212145042 is a wasteful number, since it uses less digits than its factorization.

212145042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35357512.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 212145042 is about 14565.1996896713. The cubic root of 212145042 is about 596.4091469398.

Adding to 212145042 its reverse (240541212), we get a palindrome (452686254).

The spelling of 212145042 in words is "two hundred twelve million, one hundred forty-five thousand, forty-two".