145123 has 8 divisors (see below), whose sum is σ = 161280. Its totient is φ = 129480.

The previous prime is 145121. The next prime is 145133. The reversal of 145123 is 321541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145123 - 2¹ = 145121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145097 and 145106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 786 + ... + 952.

It is an arithmetic number, because the mean of its divisors is an integer number (20160).

2¹⁴⁵¹²³ is an apocalyptic number.

145123 is a deficient number, since it is larger than the sum of its proper divisors (16157).

145123 is a wasteful number, since it uses less digits than its factorization.

145123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257.

The product of its digits is 120, while the sum is 16.

The square root of 145123 is about 380.9501279695. The cubic root of 145123 is about 52.5507294991.

Adding to 145123 its reverse (321541), we get a palindrome (466664).

The spelling of 145123 in words is "one hundred forty-five thousand, one hundred twenty-three".