212842749 has 8 divisors (see below), whose sum is σ = 324331840. Its totient is φ = 121624416.

The previous prime is 212842727. The next prime is 212842757. The reversal of 212842749 is 947248212.

It is a happy number.

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

It is not a de Polignac number, because 212842749 - 2⁵ = 212842717 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212842709) by changing a digit.

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, 5067664 + ... + 5067705.

It is an arithmetic number, because the mean of its divisors is an integer number (40541480).

Almost surely, 2^212842749 is an apocalyptic number.

It is an amenable number.

212842749 is a deficient number, since it is larger than the sum of its proper divisors (111489091).

212842749 is a wasteful number, since it uses less digits than its factorization.

212842749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10135379.

The product of its digits is 64512, while the sum is 39.

The square root of 212842749 is about 14589.1311941459. The cubic root of 212842749 is about 597.0622590502.

The spelling of 212842749 in words is "two hundred twelve million, eight hundred forty-two thousand, seven hundred forty-nine".