81430 has 16 divisors (see below), whose sum is σ = 155520. Its totient is φ = 30592.

The previous prime is 81421. The next prime is 81439. The reversal of 81430 is 3418.

81430 is an esthetic number in base 5, because in such base its adjacent digits differ by 1.

It is an interprime number because it is at equal distance from previous prime (81421) and next prime (81439).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81439) by changing a digit.

81430 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 7 ways as a sum of consecutive naturals, for example, 70 + ... + 409.

It is an arithmetic number, because the mean of its divisors is an integer number (9720).

2⁸¹⁴³⁰ is an apocalyptic number.

81430 is a deficient number, since it is larger than the sum of its proper divisors (74090).

81430 is a wasteful number, since it uses less digits than its factorization.

81430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 81430 is about 285.3594224833. The cubic root of 81430 is about 43.3439158901.

Adding to 81430 its reverse (3418), we get a palindrome (84848).

The spelling of 81430 in words is "eighty-one thousand, four hundred thirty".