21141125 has 8 divisors (see below), whose sum is σ = 26384280. Its totient is φ = 16912800.

The previous prime is 21141103. The next prime is 21141137. The reversal of 21141125 is 52114112.

It can be written as a sum of positive squares in 4 ways, for example, as 4502884 + 16638241 = 2122^2 + 4079^2 .

It is not a de Polignac number, because 21141125 - 2⁶ = 21141061 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84440 + ... + 84689.

It is an arithmetic number, because the mean of its divisors is an integer number (3298035).

Almost surely, 2^21141125 is an apocalyptic number.

21141125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21141125 is a deficient number, since it is larger than the sum of its proper divisors (5243155).

21141125 is an equidigital number, since it uses as much as digits as its factorization.

21141125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169144 (or 169134 counting only the distinct ones).

The product of its digits is 80, while the sum is 17.

The square root of 21141125 is about 4597.9479118407. The cubic root of 21141125 is about 276.5090592796.

Adding to 21141125 its reverse (52114112), we get a palindrome (73255237).

The spelling of 21141125 in words is "twenty-one million, one hundred forty-one thousand, one hundred twenty-five".