21241234 has 16 divisors (see below), whose sum is σ = 37101888. Its totient is φ = 8931312.

The previous prime is 21241229. The next prime is 21241247. The reversal of 21241234 is 43214212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13572 + ... + 15055.

It is an arithmetic number, because the mean of its divisors is an integer number (2318868).

Almost surely, 2^21241234 is an apocalyptic number.

21241234 is a deficient number, since it is larger than the sum of its proper divisors (15860654).

21241234 is a wasteful number, since it uses less digits than its factorization.

21241234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28689.

The product of its digits is 384, while the sum is 19.

The square root of 21241234 is about 4608.8213243735. The cubic root of 21241234 is about 276.9448208195.

Adding to 21241234 its reverse (43214212), we get a palindrome (64455446).

The spelling of 21241234 in words is "twenty-one million, two hundred forty-one thousand, two hundred thirty-four".