21614401 has 8 divisors (see below), whose sum is σ = 22532480. Its totient is φ = 20713968.

The previous prime is 21614399. The next prime is 21614431. The reversal of 21614401 is 10441612.

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

It is a cyclic number.

It is not a de Polignac number, because 21614401 - 2¹ = 21614399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21614431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1881 + ... + 6838.

It is an arithmetic number, because the mean of its divisors is an integer number (2816560).

Almost surely, 2^21614401 is an apocalyptic number.

It is an amenable number.

21614401 is a deficient number, since it is larger than the sum of its proper divisors (918079).

21614401 is an equidigital number, since it uses as much as digits as its factorization.

21614401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8823.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 21614401 is about 4649.1290582216. The cubic root of 21614401 is about 278.5572084160.

The spelling of 21614401 in words is "twenty-one million, six hundred fourteen thousand, four hundred one".