181254481 has 8 divisors (see below), whose sum is σ = 185862600. Its totient is φ = 176655360.

The previous prime is 181254461. The next prime is 181254517. The reversal of 181254481 is 184452181.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 26873856 + 154380625 = 5184^2 + 12425^2 .

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 181254481 - 2²³ = 172865873 is a prime.

It is a super-2 number, since 2×181254481² = 65706373765158722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (181254461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59565 + ... + 62533.

It is an arithmetic number, because the mean of its divisors is an integer number (23232825).

Almost surely, 2^181254481 is an apocalyptic number.

It is an amenable number.

181254481 is a deficient number, since it is larger than the sum of its proper divisors (4608119).

181254481 is a wasteful number, since it uses less digits than its factorization.

181254481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4499.

The product of its digits is 10240, while the sum is 34.

The square root of 181254481 is about 13463.0784369698. The cubic root of 181254481 is about 565.9302616904.

The spelling of 181254481 in words is "one hundred eighty-one million, two hundred fifty-four thousand, four hundred eighty-one".