21241602 has 56 divisors (see below), whose sum is σ = 50640876. Its totient is φ = 6656256.

The previous prime is 21241573. The next prime is 21241631. The reversal of 21241602 is 20614212.

21241602 is a `hidden beast` number, since 21 + 2 + 41 + 602 = 666.

It is an interprime number because it is at equal distance from previous prime (21241573) and next prime (21241631).

It can be written as a sum of positive squares in 2 ways, for example, as 17969121 + 3272481 = 4239^2 + 1809^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 24358 + ... + 25214.

Almost surely, 2^21241602 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21241602, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25320438).

21241602 is an abundant number, since it is smaller than the sum of its proper divisors (29399274).

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

21241602 is an equidigital number, since it uses as much as digits as its factorization.

21241602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894 (or 879 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 21241602 is about 4608.8612476402. The cubic root of 21241602 is about 276.9464201476.

Adding to 21241602 its reverse (20614212), we get a palindrome (41855814).

It can be divided in two parts, 212 and 41602, that added together give a palindrome (41814).

The spelling of 21241602 in words is "twenty-one million, two hundred forty-one thousand, six hundred two".