145120323 has 4 divisors (see below), whose sum is σ = 193493768. Its totient is φ = 96746880.

The previous prime is 145120301. The next prime is 145120333. The reversal of 145120323 is 323021541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 323021541 = 3 ⋅107673847.

It is not a de Polignac number, because 145120323 - 2⁵ = 145120291 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145120323.

It is not an unprimeable number, because it can be changed into a prime (145120333) 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, 24186718 + ... + 24186723.

It is an arithmetic number, because the mean of its divisors is an integer number (48373442).

Almost surely, 2^145120323 is an apocalyptic number.

145120323 is a deficient number, since it is larger than the sum of its proper divisors (48373445).

145120323 is an equidigital number, since it uses as much as digits as its factorization.

145120323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48373444.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 145120323 is about 12046.5896833917. The cubic root of 145120323 is about 525.5040637286.

Adding to 145120323 its reverse (323021541), we get a palindrome (468141864).

The spelling of 145120323 in words is "one hundred forty-five million, one hundred twenty thousand, three hundred twenty-three".