21230601 has 8 divisors (see below), whose sum is σ = 32351424. Its totient is φ = 12131760.

The previous prime is 21230597. The next prime is 21230611. The reversal of 21230601 is 10603212.

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

It is not a de Polignac number, because 21230601 - 2² = 21230597 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21230611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 505470 + ... + 505511.

It is an arithmetic number, because the mean of its divisors is an integer number (4043928).

Almost surely, 2^21230601 is an apocalyptic number.

21230601 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21230601 is a deficient number, since it is larger than the sum of its proper divisors (11120823).

21230601 is a wasteful number, since it uses less digits than its factorization.

21230601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010991.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 21230601 is about 4607.6676312425. The cubic root of 21230601 is about 276.8986018196.

Adding to 21230601 its reverse (10603212), we get a palindrome (31833813).

The spelling of 21230601 in words is "twenty-one million, two hundred thirty thousand, six hundred one".