21414115 has 4 divisors (see below), whose sum is σ = 25696944. Its totient is φ = 17131288.

The previous prime is 21414103. The next prime is 21414119. The reversal of 21414115 is 51141412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21414115 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21414092 and 21414101.

It is not an unprimeable number, because it can be changed into a prime (21414119) 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 3 ways as a sum of consecutive naturals, for example, 2141407 + ... + 2141416.

It is an arithmetic number, because the mean of its divisors is an integer number (6424236).

Almost surely, 2^21414115 is an apocalyptic number.

21414115 is a deficient number, since it is larger than the sum of its proper divisors (4282829).

21414115 is an equidigital number, since it uses as much as digits as its factorization.

21414115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4282828.

The product of its digits is 160, while the sum is 19.

The square root of 21414115 is about 4627.5387626686. The cubic root of 21414115 is about 277.6941368028.

Adding to 21414115 its reverse (51141412), we get a palindrome (72555527).

The spelling of 21414115 in words is "twenty-one million, four hundred fourteen thousand, one hundred fifteen".