21241465 has 8 divisors (see below), whose sum is σ = 29131200. Its totient is φ = 14565552.

The previous prime is 21241457. The next prime is 21241469. The reversal of 21241465 is 56414212.

It is a happy number.

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 21241465 - 2³ = 21241457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21241469) 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, 303415 + ... + 303484.

It is an arithmetic number, because the mean of its divisors is an integer number (3641400).

Almost surely, 2^21241465 is an apocalyptic number.

It is an amenable number.

21241465 is a deficient number, since it is larger than the sum of its proper divisors (7889735).

21241465 is an equidigital number, since it uses as much as digits as its factorization.

21241465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606911.

The product of its digits is 1920, while the sum is 25.

The square root of 21241465 is about 4608.8463849428. The cubic root of 21241465 is about 276.9458247477.

Adding to 21241465 its reverse (56414212), we get a palindrome (77655677).

The spelling of 21241465 in words is "twenty-one million, two hundred forty-one thousand, four hundred sixty-five".