145809503 has 8 divisors (see below), whose sum is σ = 168647808. Its totient is φ = 123473304.

The previous prime is 145809497. The next prime is 145809529. The reversal of 145809503 is 305908541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145809503 - 2⁸ = 145809247 is a prime.

It is a super-2 number, since 2×145809503² = 42520822330214018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145809583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124901 + ... + 126062.

It is an arithmetic number, because the mean of its divisors is an integer number (21080976).

Almost surely, 2^145809503 is an apocalyptic number.

145809503 is a deficient number, since it is larger than the sum of its proper divisors (22838305).

145809503 is an equidigital number, since it uses as much as digits as its factorization.

145809503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251053.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 145809503 is about 12075.1605786424. The cubic root of 145809503 is about 526.3346275849.

The spelling of 145809503 in words is "one hundred forty-five million, eight hundred nine thousand, five hundred three".