146444321 has 4 divisors (see below), whose sum is σ = 146656944. Its totient is φ = 146231700.

The previous prime is 146444317. The next prime is 146444359. The reversal of 146444321 is 123444641.

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, and also an emirpimes, since its reverse is a distinct semiprime: 123444641 = 1579 ⋅78179.

It is a cyclic number.

It is not a de Polignac number, because 146444321 - 2² = 146444317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (146444821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105275 + ... + 106656.

It is an arithmetic number, because the mean of its divisors is an integer number (36664236).

Almost surely, 2^146444321 is an apocalyptic number.

It is an amenable number.

146444321 is a deficient number, since it is larger than the sum of its proper divisors (212623).

146444321 is an equidigital number, since it uses as much as digits as its factorization.

146444321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212622.

The product of its digits is 9216, while the sum is 29.

The square root of 146444321 is about 12101.4181400363. The cubic root of 146444321 is about 527.0973647109.

Adding to 146444321 its reverse (123444641), we get a palindrome (269888962).

The spelling of 146444321 in words is "one hundred forty-six million, four hundred forty-four thousand, three hundred twenty-one".