84547257 has 16 divisors (see below), whose sum is σ = 116495232. Its totient is φ = 54501120.

The previous prime is 84547231. The next prime is 84547271. The reversal of 84547257 is 75274548.

It is not a de Polignac number, because 84547257 - 2⁶ = 84547193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84547217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16257 + ... + 20817.

It is an arithmetic number, because the mean of its divisors is an integer number (7280952).

Almost surely, 2^84547257 is an apocalyptic number.

It is an amenable number.

84547257 is a deficient number, since it is larger than the sum of its proper divisors (31947975).

84547257 is a wasteful number, since it uses less digits than its factorization.

84547257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4768.

The product of its digits is 313600, while the sum is 42.

The square root of 84547257 is about 9194.9582380781. The cubic root of 84547257 is about 438.9009363734.

The spelling of 84547257 in words is "eighty-four million, five hundred forty-seven thousand, two hundred fifty-seven".