81470 has 8 divisors (see below), whose sum is σ = 146664. Its totient is φ = 32584.

The previous prime is 81463. The next prime is 81509. The reversal of 81470 is 7418.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 81470.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4064 + ... + 4083.

It is an arithmetic number, because the mean of its divisors is an integer number (18333).

2⁸¹⁴⁷⁰ is an apocalyptic number.

81470 is a deficient number, since it is larger than the sum of its proper divisors (65194).

81470 is a wasteful number, since it uses less digits than its factorization.

81470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8154.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 81470 is about 285.4295009280. The cubic root of 81470 is about 43.3510118532.

Adding to 81470 its reverse (7418), we get a palindrome (88888).

The spelling of 81470 in words is "eighty-one thousand, four hundred seventy".