21352125 has 32 divisors (see below), whose sum is σ = 35957376. Its totient is φ = 11251200.

The previous prime is 21352109. The next prime is 21352127. The reversal of 21352125 is 52125312.

It is not a de Polignac number, because 21352125 - 2⁴ = 21352109 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21352127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36082 + ... + 36668.

It is an arithmetic number, because the mean of its divisors is an integer number (1123668).

Almost surely, 2^21352125 is an apocalyptic number.

21352125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21352125 is a deficient number, since it is larger than the sum of its proper divisors (14605251).

21352125 is an equidigital number, since it uses as much as digits as its factorization.

21352125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702 (or 692 counting only the distinct ones).

The product of its digits is 600, while the sum is 21.

The square root of 21352125 is about 4620.8359633296. The cubic root of 21352125 is about 277.4259196785.

Adding to 21352125 its reverse (52125312), we get a palindrome (73477437).

The spelling of 21352125 in words is "twenty-one million, three hundred fifty-two thousand, one hundred twenty-five".