84549251 has 4 divisors (see below), whose sum is σ = 84687792. Its totient is φ = 84410712.

The previous prime is 84549209. The next prime is 84549271. The reversal of 84549251 is 15294548.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 84549251 - 2⁶ = 84549187 is a prime.

It is a super-2 number, since 2×84549251² = 14297151689322002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84549271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68351 + ... + 69576.

It is an arithmetic number, because the mean of its divisors is an integer number (21171948).

Almost surely, 2^84549251 is an apocalyptic number.

84549251 is a deficient number, since it is larger than the sum of its proper divisors (138541).

84549251 is a wasteful number, since it uses less digits than its factorization.

84549251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138540.

The product of its digits is 57600, while the sum is 38.

The square root of 84549251 is about 9195.0666664250. The cubic root of 84549251 is about 438.9043867577.

The spelling of 84549251 in words is "eighty-four million, five hundred forty-nine thousand, two hundred fifty-one".