86161257 has 96 divisors (see below), whose sum is σ = 165984000. Its totient is φ = 42674688.

The previous prime is 86161237. The next prime is 86161261. The reversal of 86161257 is 75216168.

It is not a de Polignac number, because 86161257 - 2¹² = 86157161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86161237) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 762433 + ... + 762545.

It is an arithmetic number, because the mean of its divisors is an integer number (1729000).

Almost surely, 2^86161257 is an apocalyptic number.

It is an amenable number.

86161257 is a deficient number, since it is larger than the sum of its proper divisors (79822743).

86161257 is a wasteful number, since it uses less digits than its factorization.

86161257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172 (or 155 counting only the distinct ones).

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

The square root of 86161257 is about 9282.3088183921. The cubic root of 86161257 is about 441.6762112727.

The spelling of 86161257 in words is "eighty-six million, one hundred sixty-one thousand, two hundred fifty-seven".