81453 has 8 divisors (see below), whose sum is σ = 114400.
Its totient is φ = 51408.
The previous prime is 81439. The next prime is 81457. The reversal of 81453 is 35418.
It is a sphenic number, since it is the product of 3 distinct primes.
It is not a de Polignac number, because 81453 - 25 = 81421 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 (81457) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 658 + ... + 771.
It is an arithmetic number, because the mean of its divisors is an integer number (14300).
281453 is an apocalyptic number.
It is an amenable number.
81453 is a deficient number, since it is larger than the sum of its proper divisors (32947).
81453 is a wasteful number, since it uses less digits than its factorization.
81453 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1451.
The product of its digits is 480, while the sum is 21.
The square root of 81453 is about 285.3997196915.
The cubic root of 81453 is about 43.3479963527.
The spelling of 81453 in words is "eighty-one thousand, four hundred fifty-three".