10506503 has 4 divisors (see below), whose sum is σ = 12007440. Its totient is φ = 9005568.

The previous prime is 10506499. The next prime is 10506523. The reversal of 10506503 is 30560501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30560501 = 73 ⋅418637.

It is a cyclic number.

It is not a de Polignac number, because 10506503 - 2² = 10506499 is a prime.

It is a super-2 number, since 2×10506503² = 220773210578018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10506523) 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, 750458 + ... + 750471.

It is an arithmetic number, because the mean of its divisors is an integer number (3001860).

Almost surely, 2^10506503 is an apocalyptic number.

10506503 is a deficient number, since it is larger than the sum of its proper divisors (1500937).

10506503 is an equidigital number, since it uses as much as digits as its factorization.

10506503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1500936.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 10506503 is about 3241.3736285717. The cubic root of 10506503 is about 219.0211540348.

The spelling of 10506503 in words is "ten million, five hundred six thousand, five hundred three".