125420503 has 4 divisors (see below), whose sum is σ = 135068248. Its totient is φ = 115772760.

The previous prime is 125420483. The next prime is 125420521. The reversal of 125420503 is 305024521.

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 125420503 - 2¹³ = 125412311 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 (125420593) 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, 4823853 + ... + 4823878.

It is an arithmetic number, because the mean of its divisors is an integer number (33767062).

Almost surely, 2^125420503 is an apocalyptic number.

125420503 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

125420503 is a deficient number, since it is larger than the sum of its proper divisors (9647745).

125420503 is an equidigital number, since it uses as much as digits as its factorization.

125420503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9647744.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 125420503 is about 11199.1295643903. The cubic root of 125420503 is about 500.5600431358.

The spelling of 125420503 in words is "one hundred twenty-five million, four hundred twenty thousand, five hundred three".