145423 has 2 divisors, whose sum is σ = 145424. Its totient is φ = 145422.

The previous prime is 145417. The next prime is 145433. The reversal of 145423 is 324541.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 145423 - 2⁵ = 145391 is a prime.

It is a super-2 number, since 2×145423² = 42295697858, which contains 22 as substring.

It is a d-powerful number, because it can be written as 1 + 4⁵ + 4⁸ + 5⁷ + 2³ + 3⁶ .

It is a self number, because there is not a number n which added to its sum of digits gives 145423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72711 + 72712.

It is an arithmetic number, because the mean of its divisors is an integer number (72712).

2¹⁴⁵⁴²³ is an apocalyptic number.

145423 is a deficient number, since it is larger than the sum of its proper divisors (1).

145423 is an equidigital number, since it uses as much as digits as its factorization.

145423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 480, while the sum is 19.

The square root of 145423 is about 381.3436770159. The cubic root of 145423 is about 52.5869157411.

Adding to 145423 its reverse (324541), we get a palindrome (469964).

The spelling of 145423 in words is "one hundred forty-five thousand, four hundred twenty-three".