146442281 has 2 divisors, whose sum is σ = 146442282. Its totient is φ = 146442280.

The previous prime is 146442217. The next prime is 146442299. The reversal of 146442281 is 182244641.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 146192281 + 250000 = 12091^2 + 500^2 .

It is a cyclic number.

It is not a de Polignac number, because 146442281 - 2⁶ = 146442217 is a prime.

It is a super-2 number, since 2×146442281² = 42890683328965922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (146442211) 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, 73221140 + 73221141.

It is an arithmetic number, because the mean of its divisors is an integer number (73221141).

Almost surely, 2^146442281 is an apocalyptic number.

It is an amenable number.

146442281 is a deficient number, since it is larger than the sum of its proper divisors (1).

146442281 is an equidigital number, since it uses as much as digits as its factorization.

146442281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12288, while the sum is 32.

The square root of 146442281 is about 12101.3338521008. Note that the first 3 decimals coincide. The cubic root of 146442281 is about 527.0949171740.

The spelling of 146442281 in words is "one hundred forty-six million, four hundred forty-two thousand, two hundred eighty-one".