81486 has 20 divisors (see below), whose sum is σ = 182952. Its totient is φ = 27108.

The previous prime is 81463. The next prime is 81509. The reversal of 81486 is 68418.

It is an interprime number because it is at equal distance from previous prime (81463) and next prime (81509).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

81486 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 90 + ... + 413.

2⁸¹⁴⁸⁶ is an apocalyptic number.

81486 is an abundant number, since it is smaller than the sum of its proper divisors (101466).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81486 is a wasteful number, since it uses less digits than its factorization.

81486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517 (or 508 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 81486 is about 285.4575274888. The cubic root of 81486 is about 43.3538495881.

It can be divided in two parts, 814 and 86, that added together give a square (900 = 30²).

The spelling of 81486 in words is "eighty-one thousand, four hundred eighty-six".