86542257 has 16 divisors (see below), whose sum is σ = 122375232. Its totient is φ = 54213120.

The previous prime is 86542243. The next prime is 86542277. The reversal of 86542257 is 75224568.

It is not a de Polignac number, because 86542257 - 2⁶ = 86542193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86542217) 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, 46882 + ... + 48692.

It is an arithmetic number, because the mean of its divisors is an integer number (7648452).

Almost surely, 2^86542257 is an apocalyptic number.

It is an amenable number.

86542257 is a deficient number, since it is larger than the sum of its proper divisors (35832975).

86542257 is a wasteful number, since it uses less digits than its factorization.

86542257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2768.

The product of its digits is 134400, while the sum is 39.

The square root of 86542257 is about 9302.8090918819. The cubic root of 86542257 is about 442.3262760872.

The spelling of 86542257 in words is "eighty-six million, five hundred forty-two thousand, two hundred fifty-seven".