451181 has 2 divisors, whose sum is σ = 451182. Its totient is φ = 451180.

The previous prime is 451177. The next prime is 451183. The reversal of 451181 is 181154.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 434281 + 16900 = 659^2 + 130^2 .

It is a cyclic number.

It is not a de Polignac number, because 451181 - 2² = 451177 is a prime.

It is a super-2 number, since 2×451181² = 407128589522, which contains 22 as substring.

Together with 451183, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 451181.

It is not a weakly prime, because it can be changed into another prime (451183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225590 + 225591.

It is an arithmetic number, because the mean of its divisors is an integer number (225591).

2⁴⁵¹¹⁸¹ is an apocalyptic number.

It is an amenable number.

451181 is a deficient number, since it is larger than the sum of its proper divisors (1).

451181 is an equidigital number, since it uses as much as digits as its factorization.

451181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 160, while the sum is 20.

The square root of 451181 is about 671.7000818818. The cubic root of 451181 is about 76.6979225634.

The spelling of 451181 in words is "four hundred fifty-one thousand, one hundred eighty-one".