21230461 has 8 divisors (see below), whose sum is σ = 24298560. Its totient is φ = 18171168.

The previous prime is 21230459. The next prime is 21230483. The reversal of 21230461 is 16403212.

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 21230461 - 2¹ = 21230459 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21230401) 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, 4230 + ... + 7768.

It is an arithmetic number, because the mean of its divisors is an integer number (3037320).

Almost surely, 2^21230461 is an apocalyptic number.

It is an amenable number.

21230461 is a deficient number, since it is larger than the sum of its proper divisors (3068099).

21230461 is an equidigital number, since it uses as much as digits as its factorization.

21230461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4403.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 21230461 is about 4607.6524391495. The cubic root of 21230461 is about 276.8979931716.

Adding to 21230461 its reverse (16403212), we get a palindrome (37633673).

The spelling of 21230461 in words is "twenty-one million, two hundred thirty thousand, four hundred sixty-one".