157503 has 4 divisors (see below), whose sum is σ = 210008. Its totient is φ = 105000.

The previous prime is 157489. The next prime is 157513. The reversal of 157503 is 305751.

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: 305751 = 3 ⋅101917.

It is not a de Polignac number, because 157503 - 2⁸ = 157247 is a prime.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 157503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157513) 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, 26248 + ... + 26253.

It is an arithmetic number, because the mean of its divisors is an integer number (52502).

2¹⁵⁷⁵⁰³ is an apocalyptic number.

157503 is a deficient number, since it is larger than the sum of its proper divisors (52505).

157503 is an equidigital number, since it uses as much as digits as its factorization.

157503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52504.

The product of its (nonzero) digits is 525, while the sum is 21.

The square root of 157503 is about 396.8664762864. The cubic root of 157503 is about 54.0044577939.

It can be divided in two parts, 15750 and 3, that added together give a triangular number (15753 = T₁₇₇).

The spelling of 157503 in words is "one hundred fifty-seven thousand, five hundred three".