21134241 has 12 divisors (see below), whose sum is σ = 30723732. Its totient is φ = 13998816.

The previous prime is 21134237. The next prime is 21134249. The reversal of 21134241 is 14243112.

It can be written as a sum of positive squares in 2 ways, for example, as 5760000 + 15374241 = 2400^2 + 3921^2 .

It is not a de Polignac number, because 21134241 - 2² = 21134237 is a prime.

It is a super-2 number, since 2×21134241² = 893312285292162, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21134249) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6066 + ... + 8891.

It is an arithmetic number, because the mean of its divisors is an integer number (2560311).

Almost surely, 2^21134241 is an apocalyptic number.

It is an amenable number.

21134241 is a deficient number, since it is larger than the sum of its proper divisors (9589491).

21134241 is a wasteful number, since it uses less digits than its factorization.

21134241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15120 (or 15117 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 21134241 is about 4597.1992560689. The cubic root of 21134241 is about 276.4790436110.

Adding to 21134241 its reverse (14243112), we get a palindrome (35377353).

The spelling of 21134241 in words is "twenty-one million, one hundred thirty-four thousand, two hundred forty-one".