146221443 has 10 divisors (see below), whose sum is σ = 218429684. Its totient is φ = 97480908.

The previous prime is 146221433. The next prime is 146221459. The reversal of 146221443 is 344122641.

It is a happy number.

It is not a de Polignac number, because 146221443 - 2⁶ = 146221379 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (146221433) 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 in 9 ways as a sum of consecutive naturals, for example, 902521 + ... + 902682.

Almost surely, 2^146221443 is an apocalyptic number.

146221443 is a deficient number, since it is larger than the sum of its proper divisors (72208241).

146221443 is an equidigital number, since it uses as much as digits as its factorization.

146221443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1805215 (or 1805206 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 146221443 is about 12092.2058781680. The cubic root of 146221443 is about 526.8298271830.

The spelling of 146221443 in words is "one hundred forty-six million, two hundred twenty-one thousand, four hundred forty-three".