212401642 has 8 divisors (see below), whose sum is σ = 332454816. Its totient is φ = 101583372.

The previous prime is 212401613. The next prime is 212401643. The reversal of 212401642 is 246104212.

It is a happy number.

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

It is a super-2 number, since 2×212401642² = 90228915048592328, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212401643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2308668 + ... + 2308759.

It is an arithmetic number, because the mean of its divisors is an integer number (41556852).

Almost surely, 2^212401642 is an apocalyptic number.

212401642 is a deficient number, since it is larger than the sum of its proper divisors (120053174).

212401642 is a wasteful number, since it uses less digits than its factorization.

212401642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4617452.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 212401642 is about 14574.0056950723. The cubic root of 212401642 is about 596.6495122492.

Adding to 212401642 its reverse (246104212), we get a palindrome (458505854).

The spelling of 212401642 in words is "two hundred twelve million, four hundred one thousand, six hundred forty-two".