146929221 has 48 divisors (see below), whose sum is σ = 232171520. Its totient is φ = 92956248.

The previous prime is 146929219. The next prime is 146929229. The reversal of 146929221 is 122929641.

It is not a de Polignac number, because 146929221 - 2¹ = 146929219 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146929229) 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 47 ways as a sum of consecutive naturals, for example, 1156860 + ... + 1156986.

Almost surely, 2^146929221 is an apocalyptic number.

It is an amenable number.

146929221 is a deficient number, since it is larger than the sum of its proper divisors (85242299).

146929221 is an frugal number, since it uses more digits than its factorization.

146929221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194 (or 153 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 146929221 is about 12121.4364247807. The cubic root of 146929221 is about 527.6784909921.

The spelling of 146929221 in words is "one hundred forty-six million, nine hundred twenty-nine thousand, two hundred twenty-one".