146662181 has 2 divisors, whose sum is σ = 146662182. Its totient is φ = 146662180.

The previous prime is 146662177. The next prime is 146662211. The reversal of 146662181 is 181266641.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139948900 + 6713281 = 11830^2 + 2591^2 .

It is a cyclic number.

It is not a de Polignac number, because 146662181 - 2² = 146662177 is a prime.

It is a super-2 number, since 2×146662181² = 43019590671353522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (146662081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73331090 + 73331091.

It is an arithmetic number, because the mean of its divisors is an integer number (73331091).

Almost surely, 2^146662181 is an apocalyptic number.

It is an amenable number.

146662181 is a deficient number, since it is larger than the sum of its proper divisors (1).

146662181 is an equidigital number, since it uses as much as digits as its factorization.

146662181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 35.

The square root of 146662181 is about 12110.4162191066. The cubic root of 146662181 is about 527.3586165268.

The spelling of 146662181 in words is "one hundred forty-six million, six hundred sixty-two thousand, one hundred eighty-one".