146220449 has 2 divisors, whose sum is σ = 146220450. Its totient is φ = 146220448.

The previous prime is 146220443. The next prime is 146220463. The reversal of 146220449 is 944022641.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85692049 + 60528400 = 9257^2 + 7780^2 .

It is a cyclic number.

It is not a de Polignac number, because 146220449 - 2²⁴ = 129443233 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_8243555 and since 146220449 and 8243555 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (146220443) 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, 73110224 + 73110225.

It is an arithmetic number, because the mean of its divisors is an integer number (73110225).

Almost surely, 2^146220449 is an apocalyptic number.

It is an amenable number.

146220449 is a deficient number, since it is larger than the sum of its proper divisors (1).

146220449 is an equidigital number, since it uses as much as digits as its factorization.

146220449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 146220449 is about 12092.1647772432. The cubic root of 146220449 is about 526.8286333999.

The spelling of 146220449 in words is "one hundred forty-six million, two hundred twenty thousand, four hundred forty-nine".