86517261 has 16 divisors (see below), whose sum is σ = 128432320. Its totient is φ = 57561840.

The previous prime is 86517239. The next prime is 86517287. The reversal of 86517261 is 16271568.

86517261 is a `hidden beast` number, since 86 + 517 + 2 + 61 = 666.

It is not a de Polignac number, because 86517261 - 2⁵ = 86517229 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86517961) 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, 11646 + ... + 17568.

It is an arithmetic number, because the mean of its divisors is an integer number (8027020).

Almost surely, 2^86517261 is an apocalyptic number.

It is an amenable number.

86517261 is a deficient number, since it is larger than the sum of its proper divisors (41915059).

86517261 is a wasteful number, since it uses less digits than its factorization.

86517261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6473 (or 6467 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 86517261 is about 9301.4655296894. The cubic root of 86517261 is about 442.2836862872.

The spelling of 86517261 in words is "eighty-six million, five hundred seventeen thousand, two hundred sixty-one".