145623 has 4 divisors (see below), whose sum is σ = 194168. Its totient is φ = 97080.

The previous prime is 145603. The next prime is 145633. The reversal of 145623 is 326541.

It is a happy number.

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

It is not a de Polignac number, because 145623 - 2¹⁷ = 14551 is a prime.

It is a D-number.

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 145623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145603) 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, 24268 + ... + 24273.

It is an arithmetic number, because the mean of its divisors is an integer number (48542).

2¹⁴⁵⁶²³ is an apocalyptic number.

145623 is a deficient number, since it is larger than the sum of its proper divisors (48545).

145623 is an equidigital number, since it uses as much as digits as its factorization.

145623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48544.

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

The square root of 145623 is about 381.6058175657. The cubic root of 145623 is about 52.6110122625.

The spelling of 145623 in words is "one hundred forty-five thousand, six hundred twenty-three".