84252581 has 16 divisors (see below), whose sum is σ = 99297408. Its totient is φ = 69984000.

The previous prime is 84252547. The next prime is 84252587. The reversal of 84252581 is 18525248.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84252581 is a prime.

It is a super-2 number, since 2×84252581² = 14196994810323122, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84252587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45881 + ... + 47681.

It is an arithmetic number, because the mean of its divisors is an integer number (6206088).

Almost surely, 2^84252581 is an apocalyptic number.

It is an amenable number.

84252581 is a deficient number, since it is larger than the sum of its proper divisors (15044827).

84252581 is a wasteful number, since it uses less digits than its factorization.

84252581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2012.

The product of its digits is 25600, while the sum is 35.

The square root of 84252581 is about 9178.9204702950. The cubic root of 84252581 is about 438.3904363851.

The spelling of 84252581 in words is "eighty-four million, two hundred fifty-two thousand, five hundred eighty-one".