181245241 has 2 divisors, whose sum is σ = 181245242. Its totient is φ = 181245240.

The previous prime is 181245209. The next prime is 181245263. The reversal of 181245241 is 142542181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130051216 + 51194025 = 11404^2 + 7155^2 .

It is an emirp because it is prime and its reverse (142542181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 181245241 - 2⁵ = 181245209 is a prime.

It is equal to p_10095661 and since 181245241 and 10095661 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (181245271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90622620 + 90622621.

It is an arithmetic number, because the mean of its divisors is an integer number (90622621).

Almost surely, 2^181245241 is an apocalyptic number.

It is an amenable number.

181245241 is a deficient number, since it is larger than the sum of its proper divisors (1).

181245241 is an equidigital number, since it uses as much as digits as its factorization.

181245241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2560, while the sum is 28.

The square root of 181245241 is about 13462.7352718532. The cubic root of 181245241 is about 565.9206448532.

The spelling of 181245241 in words is "one hundred eighty-one million, two hundred forty-five thousand, two hundred forty-one".