21169126 has 8 divisors (see below), whose sum is σ = 34640424. Its totient is φ = 9622320.

The previous prime is 21169121. The next prime is 21169139. The reversal of 21169126 is 62196112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21169094 and 21169103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21169121) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 481095 + ... + 481138.

It is an arithmetic number, because the mean of its divisors is an integer number (4330053).

Almost surely, 2^21169126 is an apocalyptic number.

21169126 is a deficient number, since it is larger than the sum of its proper divisors (13471298).

21169126 is a wasteful number, since it uses less digits than its factorization.

21169126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 962246.

The product of its digits is 1296, while the sum is 28.

The square root of 21169126 is about 4600.9918495907. The cubic root of 21169126 is about 276.6310823414.

The spelling of 21169126 in words is "twenty-one million, one hundred sixty-nine thousand, one hundred twenty-six".