146331281 has 2 divisors, whose sum is σ = 146331282. Its totient is φ = 146331280.

The previous prime is 146331259. The next prime is 146331299. The reversal of 146331281 is 182133641.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144985681 + 1345600 = 12041^2 + 1160^2 .

It is a cyclic number.

It is not a de Polignac number, because 146331281 - 2¹⁸ = 146069137 is a prime.

It is a super-2 number, since 2×146331281² = 42825687598201922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (146330281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73165640 + 73165641.

It is an arithmetic number, because the mean of its divisors is an integer number (73165641).

Almost surely, 2^146331281 is an apocalyptic number.

It is an amenable number.

146331281 is a deficient number, since it is larger than the sum of its proper divisors (1).

146331281 is an equidigital number, since it uses as much as digits as its factorization.

146331281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 29.

The square root of 146331281 is about 12096.7467114096. The cubic root of 146331281 is about 526.9617080942.

The spelling of 146331281 in words is "one hundred forty-six million, three hundred thirty-one thousand, two hundred eighty-one".