21282485 has 16 divisors (see below), whose sum is σ = 29901312. Its totient is φ = 14236800.

The previous prime is 21282467. The next prime is 21282497. The reversal of 21282485 is 58428212.

It is a de Polignac number, because none of the positive numbers 2^k-21282485 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5981 + ... + 8850.

It is an arithmetic number, because the mean of its divisors is an integer number (1868832).

Almost surely, 2^21282485 is an apocalyptic number.

It is an amenable number.

21282485 is a deficient number, since it is larger than the sum of its proper divisors (8618827).

21282485 is a wasteful number, since it uses less digits than its factorization.

21282485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14884.

The product of its digits is 10240, while the sum is 32.

The square root of 21282485 is about 4613.2943760398. The cubic root of 21282485 is about 277.1239827800.

The spelling of 21282485 in words is "twenty-one million, two hundred eighty-two thousand, four hundred eighty-five".