21414142 has 8 divisors (see below), whose sum is σ = 32184432. Its totient is φ = 10686000.

The previous prime is 21414119. The next prime is 21414193. The reversal of 21414142 is 24141412.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9234 + ... + 11317.

It is an arithmetic number, because the mean of its divisors is an integer number (4023054).

Almost surely, 2^21414142 is an apocalyptic number.

21414142 is a deficient number, since it is larger than the sum of its proper divisors (10770290).

21414142 is a wasteful number, since it uses less digits than its factorization.

21414142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21074.

The product of its digits is 256, while the sum is 19.

The square root of 21414142 is about 4627.5416799852. The cubic root of 21414142 is about 277.6942535130.

Adding to 21414142 its reverse (24141412), we get a palindrome (45555554).

The spelling of 21414142 in words is "twenty-one million, four hundred fourteen thousand, one hundred forty-two".