84282521 has 8 divisors (see below), whose sum is σ = 87458304. Its totient is φ = 81135360.

The previous prime is 84282491. The next prime is 84282551. The reversal of 84282521 is 12528248.

It is an interprime number because it is at equal distance from previous prime (84282491) and next prime (84282551).

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

It is a cyclic number.

It is not a de Polignac number, because 84282521 - 2¹⁰ = 84281497 is a prime.

It is a super-2 number, since 2×84282521² = 14207086692230882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84282551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1061 + ... + 13026.

It is an arithmetic number, because the mean of its divisors is an integer number (10932288).

Almost surely, 2^84282521 is an apocalyptic number.

It is an amenable number.

84282521 is a deficient number, since it is larger than the sum of its proper divisors (3175783).

84282521 is a wasteful number, since it uses less digits than its factorization.

84282521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14311.

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

The square root of 84282521 is about 9180.5512361731. The cubic root of 84282521 is about 438.4423590485.

The spelling of 84282521 in words is "eighty-four million, two hundred eighty-two thousand, five hundred twenty-one".