86321457 has 10 divisors (see below), whose sum is σ = 128949458. Its totient is φ = 57547584.

The previous prime is 86321449. The next prime is 86321479. The reversal of 86321457 is 75412368.

86321457 is a `hidden beast` number, since 8 + 632 + 14 + 5 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 76055841 + 10265616 = 8721^2 + 3204^2 .

It is not a de Polignac number, because 86321457 - 2³ = 86321449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86321437) 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 9 ways as a sum of consecutive naturals, for example, 532768 + ... + 532929.

Almost surely, 2^86321457 is an apocalyptic number.

It is an amenable number.

86321457 is a deficient number, since it is larger than the sum of its proper divisors (42628001).

86321457 is a wasteful number, since it uses less digits than its factorization.

86321457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065709 (or 1065700 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 86321457 is about 9290.9341295695. The cubic root of 86321457 is about 441.9497786281.

The spelling of 86321457 in words is "eighty-six million, three hundred twenty-one thousand, four hundred fifty-seven".