21134401 has 8 divisors (see below), whose sum is σ = 22104000. Its totient is φ = 20169072.

The previous prime is 21134389. The next prime is 21134419. The reversal of 21134401 is 10443112.

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 21134401 - 2⁵ = 21134369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21134431) 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, 13350 + ... + 14848.

It is an arithmetic number, because the mean of its divisors is an integer number (2763000).

Almost surely, 2^21134401 is an apocalyptic number.

It is an amenable number.

21134401 is a deficient number, since it is larger than the sum of its proper divisors (969599).

21134401 is a wasteful number, since it uses less digits than its factorization.

21134401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2135.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 21134401 is about 4597.2166579355. The cubic root of 21134401 is about 276.4797413181.

Adding to 21134401 its reverse (10443112), we get a palindrome (31577513).

The spelling of 21134401 in words is "twenty-one million, one hundred thirty-four thousand, four hundred one".