21260750 has 32 divisors (see below), whose sum is σ = 45489600. Its totient is φ = 7288800.

The previous prime is 21260749. The next prime is 21260797. The reversal of 21260750 is 5706212.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4325 + ... + 7824.

It is an arithmetic number, because the mean of its divisors is an integer number (1421550).

Almost surely, 2^21260750 is an apocalyptic number.

21260750 is an abundant number, since it is smaller than the sum of its proper divisors (24228850).

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

21260750 is a wasteful number, since it uses less digits than its factorization.

21260750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12173 (or 12163 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 21260750 is about 4610.9380824296. The cubic root of 21260750 is about 277.0296118864.

Adding to 21260750 its reverse (5706212), we get a palindrome (26966962).

The spelling of 21260750 in words is "twenty-one million, two hundred sixty thousand, seven hundred fifty".