146221028 has 12 divisors (see below), whose sum is σ = 267012480. Its totient is φ = 69931752.

The previous prime is 146221013. The next prime is 146221067. The reversal of 146221028 is 820122641.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 146220988 and 146221006.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 794588 + ... + 794771.

It is an arithmetic number, because the mean of its divisors is an integer number (22251040).

Almost surely, 2^146221028 is an apocalyptic number.

It is an amenable number.

146221028 is a deficient number, since it is larger than the sum of its proper divisors (120791452).

146221028 is a wasteful number, since it uses less digits than its factorization.

146221028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1589386 (or 1589384 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 146221028 is about 12092.1887183421. The cubic root of 146221028 is about 526.8293287732.

Adding to 146221028 its reverse (820122641), we get a palindrome (966343669).

The spelling of 146221028 in words is "one hundred forty-six million, two hundred twenty-one thousand, twenty-eight".