21301460 has 12 divisors (see below), whose sum is σ = 44733108. Its totient is φ = 8520576.

The previous prime is 21301439. The next prime is 21301463. The reversal of 21301460 is 6410312.

It can be written as a sum of positive squares in 2 ways, for example, as 16924996 + 4376464 = 4114^2 + 2092^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21301463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 532517 + ... + 532556.

It is an arithmetic number, because the mean of its divisors is an integer number (3727759).

Almost surely, 2^21301460 is an apocalyptic number.

21301460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21301460 is an abundant number, since it is smaller than the sum of its proper divisors (23431648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21301460 is a wasteful number, since it uses less digits than its factorization.

21301460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065082 (or 1065080 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 21301460 is about 4615.3504742327. The cubic root of 21301460 is about 277.2063175509.

Adding to 21301460 its reverse (6410312), we get a palindrome (27711772).

The spelling of 21301460 in words is "twenty-one million, three hundred one thousand, four hundred sixty".