145532503 has 4 divisors (see below), whose sum is σ = 145563880. Its totient is φ = 145501128.

The previous prime is 145532489. The next prime is 145532521. The reversal of 145532503 is 305235541.

145532503 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 305235541 = 13 ⋅23479657.

It is a cyclic number.

It is not a de Polignac number, because 145532503 - 2¹³ = 145524311 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 (145532593) 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, 7200 + ... + 18517.

It is an arithmetic number, because the mean of its divisors is an integer number (36390970).

Almost surely, 2^145532503 is an apocalyptic number.

145532503 is a deficient number, since it is larger than the sum of its proper divisors (31377).

145532503 is an equidigital number, since it uses as much as digits as its factorization.

145532503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31376.

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 145532503 is about 12063.6852992773. The cubic root of 145532503 is about 526.0011168274.

The spelling of 145532503 in words is "one hundred forty-five million, five hundred thirty-two thousand, five hundred three".