145244023 has 4 divisors (see below), whose sum is σ = 146352888. Its totient is φ = 144135160.

The previous prime is 145243991. The next prime is 145244041. The reversal of 145244023 is 320442541.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 320442541 = 2671 ⋅119971.

It is a cyclic number.

It is not a de Polignac number, because 145244023 - 2⁵ = 145243991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145244063) 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, 554236 + ... + 554497.

It is an arithmetic number, because the mean of its divisors is an integer number (36588222).

Almost surely, 2^145244023 is an apocalyptic number.

145244023 is a deficient number, since it is larger than the sum of its proper divisors (1108865).

145244023 is a wasteful number, since it uses less digits than its factorization.

145244023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1108864.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 145244023 is about 12051.7228228996. The cubic root of 145244023 is about 525.6533338655.

Adding to 145244023 its reverse (320442541), we get a palindrome (465686564).

The spelling of 145244023 in words is "one hundred forty-five million, two hundred forty-four thousand, twenty-three".