212242642 has 8 divisors (see below), whose sum is σ = 319489776. Its totient is φ = 105746052.

The previous prime is 212242601. The next prime is 212242649. The reversal of 212242642 is 246242212.

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

It is not an unprimeable number, because it can be changed into a prime (212242649) 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, 186928 + ... + 188059.

It is an arithmetic number, because the mean of its divisors is an integer number (39936222).

Almost surely, 2^212242642 is an apocalyptic number.

212242642 is a deficient number, since it is larger than the sum of its proper divisors (107247134).

212242642 is a wasteful number, since it uses less digits than its factorization.

212242642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375272.

The product of its digits is 3072, while the sum is 25.

The square root of 212242642 is about 14568.5497562386. The cubic root of 212242642 is about 596.5005947653.

Adding to 212242642 its reverse (246242212), we get a palindrome (458484854).

The spelling of 212242642 in words is "two hundred twelve million, two hundred forty-two thousand, six hundred forty-two".