146549281 has 2 divisors, whose sum is σ = 146549282. Its totient is φ = 146549280.

The previous prime is 146549279. The next prime is 146549287. The reversal of 146549281 is 182945641.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141991056 + 4558225 = 11916^2 + 2135^2 .

It is a cyclic number.

It is not a de Polignac number, because 146549281 - 2¹ = 146549279 is a prime.

It is a super-2 number, since 2×146549281² = 42953383523233922, which contains 22 as substring.

Together with 146549279, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (146549287) 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, 73274640 + 73274641.

It is an arithmetic number, because the mean of its divisors is an integer number (73274641).

Almost surely, 2^146549281 is an apocalyptic number.

It is an amenable number.

146549281 is a deficient number, since it is larger than the sum of its proper divisors (1).

146549281 is an equidigital number, since it uses as much as digits as its factorization.

146549281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 40.

The square root of 146549281 is about 12105.7540450812. The cubic root of 146549281 is about 527.2232622236.

The spelling of 146549281 in words is "one hundred forty-six million, five hundred forty-nine thousand, two hundred eighty-one".