145313123 has 4 divisors (see below), whose sum is σ = 145384008. Its totient is φ = 145242240.

The previous prime is 145313101. The next prime is 145313131. The reversal of 145313123 is 321313541.

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

It is a cyclic number.

It is not a de Polignac number, because 145313123 - 2²⁴ = 128535907 is a prime.

It is a super-2 number, since 2×145313123² = 42231807432026258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145313173) 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, 32273 + ... + 36498.

It is an arithmetic number, because the mean of its divisors is an integer number (36346002).

Almost surely, 2^145313123 is an apocalyptic number.

145313123 is a deficient number, since it is larger than the sum of its proper divisors (70885).

145313123 is an equidigital number, since it uses as much as digits as its factorization.

145313123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70884.

The product of its digits is 1080, while the sum is 23.

The square root of 145313123 is about 12054.5892920497. The cubic root of 145313123 is about 525.7366806956.

Adding to 145313123 its reverse (321313541), we get a palindrome (466626664).

The spelling of 145313123 in words is "one hundred forty-five million, three hundred thirteen thousand, one hundred twenty-three".