21460641 has 8 divisors (see below), whose sum is σ = 28644864. Its totient is φ = 14291760.

The previous prime is 21460603. The next prime is 21460643. The reversal of 21460641 is 14606412.

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

It is not a de Polignac number, because 21460641 - 2⁶ = 21460577 is a prime.

It is a super-2 number, since 2×21460641² = 921118224261762, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21460643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30 + ... + 6551.

It is an arithmetic number, because the mean of its divisors is an integer number (3580608).

Almost surely, 2^21460641 is an apocalyptic number.

It is an amenable number.

21460641 is a deficient number, since it is larger than the sum of its proper divisors (7184223).

21460641 is a wasteful number, since it uses less digits than its factorization.

21460641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7671.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 21460641 is about 4632.5631134395. The cubic root of 21460641 is about 277.8951047420.

The spelling of 21460641 in words is "twenty-one million, four hundred sixty thousand, six hundred forty-one".