1125420503 has 4 divisors (see below), whose sum is σ = 1141271568. Its totient is φ = 1109569440.

The previous prime is 1125420493. The next prime is 1125420511. The reversal of 1125420503 is 3050245211.

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 1125420503 - 2¹⁰ = 1125419479 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 (1125420563) 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, 7925426 + ... + 7925567.

It is an arithmetic number, because the mean of its divisors is an integer number (285317892).

Almost surely, 2^1125420503 is an apocalyptic number.

1125420503 is a deficient number, since it is larger than the sum of its proper divisors (15851065).

1125420503 is an equidigital number, since it uses as much as digits as its factorization.

1125420503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15851064.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1125420503 is about 33547.2875654650. The cubic root of 1125420503 is about 1040.1714778268.

Adding to 1125420503 its reverse (3050245211), we get a palindrome (4175665714).

The spelling of 1125420503 in words is "one billion, one hundred twenty-five million, four hundred twenty thousand, five hundred three".