212861742 has 16 divisors (see below), whose sum is σ = 429939792. Its totient is φ = 70251200.

The previous prime is 212861741. The next prime is 212861767. The reversal of 212861742 is 247168212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212861741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175023 + ... + 176234.

It is an arithmetic number, because the mean of its divisors is an integer number (26871237).

Almost surely, 2^212861742 is an apocalyptic number.

212861742 is an abundant number, since it is smaller than the sum of its proper divisors (217078050).

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

212861742 is a wasteful number, since it uses less digits than its factorization.

212861742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351363.

The product of its digits is 10752, while the sum is 33.

The square root of 212861742 is about 14589.7821094079. The cubic root of 212861742 is about 597.0800181177.

The spelling of 212861742 in words is "two hundred twelve million, eight hundred sixty-one thousand, seven hundred forty-two".