74181 has 8 divisors (see below), whose sum is σ = 100480. Its totient is φ = 48672.

The previous prime is 74177. The next prime is 74189. The reversal of 74181 is 18147.

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

It is not a de Polignac number, because 74181 - 2² = 74177 is a prime.

It is a super-2 number, since 2×74181² = 11005641522, which contains 22 as substring.

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

It is a Duffinian number.

It is a nialpdrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81 + ... + 393.

It is an arithmetic number, because the mean of its divisors is an integer number (12560).

2⁷⁴¹⁸¹ is an apocalyptic number.

It is an amenable number.

74181 is a deficient number, since it is larger than the sum of its proper divisors (26299).

74181 is a wasteful number, since it uses less digits than its factorization.

74181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395.

The product of its digits is 224, while the sum is 21.

The square root of 74181 is about 272.3618916075. The cubic root of 74181 is about 42.0175663481.

The spelling of 74181 in words is "seventy-four thousand, one hundred eighty-one".