145545023 has 4 divisors (see below), whose sum is σ = 156740808. Its totient is φ = 134349240.

The previous prime is 145544983. The next prime is 145545053. The reversal of 145545023 is 320545541.

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 145545023 - 2⁸ = 145544767 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 (145545053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5597873 + ... + 5597898.

It is an arithmetic number, because the mean of its divisors is an integer number (39185202).

Almost surely, 2^145545023 is an apocalyptic number.

145545023 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

145545023 is a deficient number, since it is larger than the sum of its proper divisors (11195785).

145545023 is a wasteful number, since it uses less digits than its factorization.

145545023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11195784.

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 145545023 is about 12064.2042008580. The cubic root of 145545023 is about 526.0162001593.

The spelling of 145545023 in words is "one hundred forty-five million, five hundred forty-five thousand, twenty-three".