146171221 has 8 divisors (see below), whose sum is σ = 167987520. Its totient is φ = 124588608.

The previous prime is 146171209. The next prime is 146171227. The reversal of 146171221 is 122171641.

146171221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 146171221 - 2²³ = 137782613 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 (146171227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57076 + ... + 59581.

It is an arithmetic number, because the mean of its divisors is an integer number (20998440).

Almost surely, 2^146171221 is an apocalyptic number.

It is an amenable number.

146171221 is a deficient number, since it is larger than the sum of its proper divisors (21816299).

146171221 is a wasteful number, since it uses less digits than its factorization.

146171221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116843.

The product of its digits is 672, while the sum is 25.

The square root of 146171221 is about 12090.1290729256. The cubic root of 146171221 is about 526.7695043447.

The spelling of 146171221 in words is "one hundred forty-six million, one hundred seventy-one thousand, two hundred twenty-one".