120143581 has 2 divisors, whose sum is σ = 120143582. Its totient is φ = 120143580.

The previous prime is 120143563. The next prime is 120143623. The reversal of 120143581 is 185341021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119902500 + 241081 = 10950^2 + 491^2 .

It is a cyclic number.

It is not a de Polignac number, because 120143581 - 2⁷ = 120143453 is a prime.

It is a super-2 number, since 2×120143581² = 28868960111007122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120143501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60071790 + 60071791.

It is an arithmetic number, because the mean of its divisors is an integer number (60071791).

Almost surely, 2^120143581 is an apocalyptic number.

It is an amenable number.

120143581 is a deficient number, since it is larger than the sum of its proper divisors (1).

120143581 is an equidigital number, since it uses as much as digits as its factorization.

120143581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 120143581 is about 10961.0027369762. The cubic root of 120143581 is about 493.4390593446.

The spelling of 120143581 in words is "one hundred twenty million, one hundred forty-three thousand, five hundred eighty-one".