21461301 has 16 divisors (see below), whose sum is σ = 31894720. Its totient is φ = 14262480.

The previous prime is 21461287. The next prime is 21461329. The reversal of 21461301 is 10316412.

It is a happy number.

It is not a de Polignac number, because 21461301 - 2⁷ = 21461173 is a prime.

It is a super-2 number, since 2×21461301² = 921174881225202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21461201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9006 + ... + 11136.

It is an arithmetic number, because the mean of its divisors is an integer number (1993420).

Almost surely, 2^21461301 is an apocalyptic number.

It is an amenable number.

21461301 is a deficient number, since it is larger than the sum of its proper divisors (10433419).

21461301 is a wasteful number, since it uses less digits than its factorization.

21461301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2513 (or 2507 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 21461301 is about 4632.6343477551. The cubic root of 21461301 is about 277.8979535057.

Adding to 21461301 its reverse (10316412), we get a palindrome (31777713).

The spelling of 21461301 in words is "twenty-one million, four hundred sixty-one thousand, three hundred one".