125305519 has 2 divisors, whose sum is σ = 125305520. Its totient is φ = 125305518.

The previous prime is 125305493. The next prime is 125305559. The reversal of 125305519 is 915503521.

It is a weak prime.

It is an emirp because it is prime and its reverse (915503521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125305519 - 2²³ = 116916911 is a prime.

It is a super-2 number, since 2×125305519² = 31402946183718722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125305559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62652759 + 62652760.

It is an arithmetic number, because the mean of its divisors is an integer number (62652760).

Almost surely, 2^125305519 is an apocalyptic number.

125305519 is a deficient number, since it is larger than the sum of its proper divisors (1).

125305519 is an equidigital number, since it uses as much as digits as its factorization.

125305519 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6750, while the sum is 31.

The square root of 125305519 is about 11193.9947739848. The cubic root of 125305519 is about 500.4070272344.

The spelling of 125305519 in words is "one hundred twenty-five million, three hundred five thousand, five hundred nineteen".