86519421 has 24 divisors (see below), whose sum is σ = 130049920. Its totient is φ = 57480192.

The previous prime is 86519417. The next prime is 86519423. The reversal of 86519421 is 12491568.

It is not a de Polignac number, because 86519421 - 2² = 86519417 is a prime.

It is a super-2 number, since 2×86519421² = 14971220420350482, which contains 22 as substring.

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 (86519423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 112125 + ... + 112893.

Almost surely, 2^86519421 is an apocalyptic number.

86519421 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

86519421 is a deficient number, since it is larger than the sum of its proper divisors (43530499).

86519421 is an equidigital number, since it uses as much as digits as its factorization.

With its successor (86519422) it forms an eRAP, since the sums of their prime factors are consecutive (1247 and 1248).

86519421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1247 (or 1235 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 86519421 is about 9301.5816396998. The cubic root of 86519421 is about 442.2873669586.

The spelling of 86519421 in words is "eighty-six million, five hundred nineteen thousand, four hundred twenty-one".