21275606 has 16 divisors (see below), whose sum is σ = 34998480. Its totient is φ = 9619680.

The previous prime is 21275599. The next prime is 21275623. The reversal of 21275606 is 60657212.

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, 1880 + ... + 6788.

It is an arithmetic number, because the mean of its divisors is an integer number (2187405).

Almost surely, 2^21275606 is an apocalyptic number.

21275606 is a deficient number, since it is larger than the sum of its proper divisors (13722874).

21275606 is a wasteful number, since it uses less digits than its factorization.

21275606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5119.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 21275606 is about 4612.5487531299. The cubic root of 21275606 is about 277.0941218983.

The spelling of 21275606 in words is "twenty-one million, two hundred seventy-five thousand, six hundred six".