4181281 has 8 divisors (see below), whose sum is σ = 4530344. Its totient is φ = 3836160.

The previous prime is 4181279. The next prime is 4181293. The reversal of 4181281 is 1821814.

4181281 = T₁₁₈ + T₁₁₉ + ... + T₂₉₈.

It can be written as a sum of positive squares in 4 ways, for example, as 80656 + 4100625 = 284^2 + 2025^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 4181281 - 2¹ = 4181279 is a prime.

It is a super-2 number, since 2×4181281² = 34966221601922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4181251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1465 + ... + 3241.

It is an arithmetic number, because the mean of its divisors is an integer number (566293).

Almost surely, 2^4181281 is an apocalyptic number.

It is an amenable number.

4181281 is a deficient number, since it is larger than the sum of its proper divisors (349063).

4181281 is a wasteful number, since it uses less digits than its factorization.

4181281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1971.

The product of its digits is 512, while the sum is 25.

The square root of 4181281 is about 2044.8180848183. The cubic root of 4181281 is about 161.1028110226.

The spelling of 4181281 in words is "four million, one hundred eighty-one thousand, two hundred eighty-one".