21060575 has 6 divisors (see below), whose sum is σ = 26115144. Its totient is φ = 16848440.

The previous prime is 21060553. The next prime is 21060619. The reversal of 21060575 is 57506012.

It is not a de Polignac number, because 21060575 - 2¹² = 21056479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 421187 + ... + 421236.

It is an arithmetic number, because the mean of its divisors is an integer number (4352524).

Almost surely, 2^21060575 is an apocalyptic number.

21060575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21060575 is a deficient number, since it is larger than the sum of its proper divisors (5054569).

21060575 is an equidigital number, since it uses as much as digits as its factorization.

21060575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842433 (or 842428 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 21060575 is about 4589.1802100157. The cubic root of 21060575 is about 276.1574357334.

Adding to 21060575 its reverse (57506012), we get a palindrome (78566587).

The spelling of 21060575 in words is "twenty-one million, sixty thousand, five hundred seventy-five".