212457042 has 36 divisors (see below), whose sum is σ = 535480686. Its totient is φ = 60701760.

The previous prime is 212457029. The next prime is 212457073. The reversal of 212457042 is 240754212.

212457042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 180069561 + 32387481 = 13419^2 + 5691^2 .

It is a junction number, because it is equal to n+sod(n) for n = 212456997 and 212457015.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 119559 + ... + 121322.

Almost surely, 2^212457042 is an apocalyptic number.

212457042 is an abundant number, since it is smaller than the sum of its proper divisors (323023644).

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

212457042 is a wasteful number, since it uses less digits than its factorization.

212457042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240903 (or 240893 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 212457042 is about 14575.9062153953. The cubic root of 212457042 is about 596.7013817628.

The spelling of 212457042 in words is "two hundred twelve million, four hundred fifty-seven thousand, forty-two".