81474 has 16 divisors (see below), whose sum is σ = 167808. Its totient is φ = 26352.

The previous prime is 81463. The next prime is 81509. The reversal of 81474 is 47418.

81474 = T₄₇ + T₄₈ + ... + T₈₃.

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

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 81474.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39 + ... + 405.

It is an arithmetic number, because the mean of its divisors is an integer number (10488).

2⁸¹⁴⁷⁴ is an apocalyptic number.

81474 is an abundant number, since it is smaller than the sum of its proper divisors (86334).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83904).

81474 is a wasteful number, since it uses less digits than its factorization.

81474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409.

The product of its digits is 896, while the sum is 24.

The square root of 81474 is about 285.4365078262. The cubic root of 81474 is about 43.3517213217.

It can be divided in two parts, 814 and 74, that added together give a palindrome (888).

The spelling of 81474 in words is "eighty-one thousand, four hundred seventy-four".