147445321 has 4 divisors (see below), whose sum is σ = 149102100. Its totient is φ = 145788544.

The previous prime is 147445313. The next prime is 147445351. The reversal of 147445321 is 123544741.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 123544741 = 281 ⋅439661.

It can be written as a sum of positive squares in 2 ways, for example, as 31236921 + 116208400 = 5589^2 + 10780^2 .

It is a cyclic number.

It is not a de Polignac number, because 147445321 - 2³ = 147445313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (147445351) 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, 828256 + ... + 828433.

It is an arithmetic number, because the mean of its divisors is an integer number (37275525).

Almost surely, 2^147445321 is an apocalyptic number.

It is an amenable number.

147445321 is a deficient number, since it is larger than the sum of its proper divisors (1656779).

147445321 is an equidigital number, since it uses as much as digits as its factorization.

147445321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1656778.

The product of its digits is 13440, while the sum is 31.

The square root of 147445321 is about 12142.7064940235. The cubic root of 147445321 is about 528.2956058690.

The spelling of 147445321 in words is "one hundred forty-seven million, four hundred forty-five thousand, three hundred twenty-one".