125381503 has 4 divisors (see below), whose sum is σ = 135026248. Its totient is φ = 115736760.

The previous prime is 125381489. The next prime is 125381519. The reversal of 125381503 is 305183521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 305183521 = 283 ⋅1078387.

It is a cyclic number.

It is not a de Polignac number, because 125381503 - 2²¹ = 123284351 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 (125381573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4822353 + ... + 4822378.

It is an arithmetic number, because the mean of its divisors is an integer number (33756562).

Almost surely, 2^125381503 is an apocalyptic number.

125381503 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

125381503 is a deficient number, since it is larger than the sum of its proper divisors (9644745).

125381503 is an equidigital number, since it uses as much as digits as its factorization.

125381503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9644744.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 125381503 is about 11197.3882222597. The cubic root of 125381503 is about 500.5081540506.

It can be divided in two parts, 12538 and 1503, that added together give a palindrome (14041).

The spelling of 125381503 in words is "one hundred twenty-five million, three hundred eighty-one thousand, five hundred three".