146879221 has 6 divisors (see below), whose sum is σ = 148276310. Its totient is φ = 145495176.

The previous prime is 146879203. The next prime is 146879237. The reversal of 146879221 is 122978641.

It can be written as a sum of positive squares in only one way, i.e., 138532900 + 8346321 = 11770^2 + 2889^2 .

It is a de Polignac number, because none of the positive numbers 2^k-146879221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146879251) 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 5 ways as a sum of consecutive naturals, for example, 5035 + ... + 17863.

Almost surely, 2^146879221 is an apocalyptic number.

It is an amenable number.

146879221 is a deficient number, since it is larger than the sum of its proper divisors (1397089).

146879221 is an equidigital number, since it uses as much as digits as its factorization.

146879221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13043 (or 12936 counting only the distinct ones).

The product of its digits is 48384, while the sum is 40.

The square root of 146879221 is about 12119.3737874529. The cubic root of 146879221 is about 527.6186278876.

The spelling of 146879221 in words is "one hundred forty-six million, eight hundred seventy-nine thousand, two hundred twenty-one".