125312503 has 4 divisors (see below), whose sum is σ = 125812008. Its totient is φ = 124813000.

The previous prime is 125312479. The next prime is 125312507. The reversal of 125312503 is 305213521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125312503 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 (125312507) 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, 249376 + ... + 249877.

It is an arithmetic number, because the mean of its divisors is an integer number (31453002).

Almost surely, 2^125312503 is an apocalyptic number.

125312503 is a deficient number, since it is larger than the sum of its proper divisors (499505).

125312503 is an equidigital number, since it uses as much as digits as its factorization.

125312503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499504.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 125312503 is about 11194.3067226157. The cubic root of 125312503 is about 500.4163239192.

The spelling of 125312503 in words is "one hundred twenty-five million, three hundred twelve thousand, five hundred three".