146432021 has 4 divisors (see below), whose sum is σ = 146472000. Its totient is φ = 146392044.

The previous prime is 146432009. The next prime is 146432029. The reversal of 146432021 is 120234641.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-146432021 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 (146432029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13871 + ... + 22028.

It is an arithmetic number, because the mean of its divisors is an integer number (36618000).

Almost surely, 2^146432021 is an apocalyptic number.

It is an amenable number.

146432021 is a deficient number, since it is larger than the sum of its proper divisors (39979).

146432021 is an equidigital number, since it uses as much as digits as its factorization.

146432021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39978.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 146432021 is about 12100.9099244644. The cubic root of 146432021 is about 527.0826071588.

Adding to 146432021 its reverse (120234641), we get a palindrome (266666662).

The spelling of 146432021 in words is "one hundred forty-six million, four hundred thirty-two thousand, twenty-one".