21094265 has 8 divisors (see below), whose sum is σ = 25791048. Its totient is φ = 16556800.

The previous prime is 21094259. The next prime is 21094273. The reversal of 21094265 is 56249012.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 44521 + 21049744 = 211^2 + 4588^2 .

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

It is not a de Polignac number, because 21094265 - 2¹⁶ = 21028729 is a prime.

It is a Duffinian 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, 39536 + ... + 40065.

It is an arithmetic number, because the mean of its divisors is an integer number (3223881).

Almost surely, 2^21094265 is an apocalyptic number.

It is an amenable number.

21094265 is a deficient number, since it is larger than the sum of its proper divisors (4696783).

21094265 is an equidigital number, since it uses as much as digits as its factorization.

21094265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79659.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 21094265 is about 4592.8493334748. The cubic root of 21094265 is about 276.3046110034.

The spelling of 21094265 in words is "twenty-one million, ninety-four thousand, two hundred sixty-five".