146193281 has 6 divisors (see below), whose sum is σ = 158304150. Its totient is φ = 134947488.

The previous prime is 146193197. The next prime is 146193301. The reversal of 146193281 is 182391641.

146193281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 1809025 + 144384256 = 1345^2 + 12016^2 .

It is not a de Polignac number, because 146193281 - 2¹⁰ = 146192257 is a prime.

It is a super-2 number, since 2×146193281² = 42744950819089922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (146193181) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 432356 + ... + 432693.

It is an arithmetic number, because the mean of its divisors is an integer number (26384025).

Almost surely, 2^146193281 is an apocalyptic number.

It is an amenable number.

146193281 is a deficient number, since it is larger than the sum of its proper divisors (12110869).

146193281 is an equidigital number, since it uses as much as digits as its factorization.

146193281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865075 (or 865062 counting only the distinct ones).

The product of its digits is 10368, while the sum is 35.

The square root of 146193281 is about 12091.0413530018. The cubic root of 146193281 is about 526.7960028366.

The spelling of 146193281 in words is "one hundred forty-six million, one hundred ninety-three thousand, two hundred eighty-one".