125603519 has 2 divisors, whose sum is σ = 125603520. Its totient is φ = 125603518.

The previous prime is 125603501. The next prime is 125603521. The reversal of 125603519 is 915306521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125603519 - 2²⁴ = 108826303 is a prime.

It is a super-2 number, since 2×125603519² = 31552487970366722, which contains 22 as substring.

Together with 125603521, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125603579) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62801759 + 62801760.

It is an arithmetic number, because the mean of its divisors is an integer number (62801760).

Almost surely, 2^125603519 is an apocalyptic number.

125603519 is a deficient number, since it is larger than the sum of its proper divisors (1).

125603519 is an equidigital number, since it uses as much as digits as its factorization.

125603519 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 125603519 is about 11207.2975779177. The cubic root of 125603519 is about 500.8034004042.

The spelling of 125603519 in words is "one hundred twenty-five million, six hundred three thousand, five hundred nineteen".