212412042 has 96 divisors (see below), whose sum is σ = 509298192. Its totient is φ = 63700992.

The previous prime is 212412019. The next prime is 212412073. The reversal of 212412042 is 240214212.

212412042 is a `hidden beast` number, since 212 + 412 + 0 + 42 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 211964481 + 447561 = 14559^2 + 669^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 826378 + ... + 826634.

Almost surely, 2^212412042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212412042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254649096).

212412042 is an abundant number, since it is smaller than the sum of its proper divisors (296886150).

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

212412042 is a wasteful number, since it uses less digits than its factorization.

212412042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392 (or 389 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 212412042 is about 14574.3624903458. The cubic root of 212412042 is about 596.6592501740.

Adding to 212412042 its reverse (240214212), we get a palindrome (452626254).

The spelling of 212412042 in words is "two hundred twelve million, four hundred twelve thousand, forty-two".