21466125 has 24 divisors (see below), whose sum is σ = 38698296. Its totient is φ = 11448000.

The previous prime is 21466103. The next prime is 21466141. The reversal of 21466125 is 52166412.

21466125 is a `hidden beast` number, since 2 + 1 + 46 + 612 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3164841 + 18301284 = 1779^2 + 4278^2 .

It is not a de Polignac number, because 21466125 - 2¹¹ = 21464077 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8416 + ... + 10665.

It is an arithmetic number, because the mean of its divisors is an integer number (1612429).

Almost surely, 2^21466125 is an apocalyptic number.

21466125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21466125 is a deficient number, since it is larger than the sum of its proper divisors (17232171).

21466125 is a wasteful number, since it uses less digits than its factorization.

21466125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19102 (or 19089 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 21466125 is about 4633.1549725862. The cubic root of 21466125 is about 277.9187736057.

The spelling of 21466125 in words is "twenty-one million, four hundred sixty-six thousand, one hundred twenty-five".