146319421 has 4 divisors (see below), whose sum is σ = 147165372. Its totient is φ = 145473472.

The previous prime is 146319389. The next prime is 146319451. The reversal of 146319421 is 124913641.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 130279396 + 16040025 = 11414^2 + 4005^2 .

It is a cyclic number.

It is not a de Polignac number, because 146319421 - 2⁵ = 146319389 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 (146319451) 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 3 ways as a sum of consecutive naturals, for example, 422716 + ... + 423061.

It is an arithmetic number, because the mean of its divisors is an integer number (36791343).

Almost surely, 2^146319421 is an apocalyptic number.

It is an amenable number.

146319421 is a deficient number, since it is larger than the sum of its proper divisors (845951).

146319421 is an equidigital number, since it uses as much as digits as its factorization.

146319421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845950.

The product of its digits is 5184, while the sum is 31.

The square root of 146319421 is about 12096.2564870294. The cubic root of 146319421 is about 526.9474711412.

The spelling of 146319421 in words is "one hundred forty-six million, three hundred nineteen thousand, four hundred twenty-one".