125440519 has 2 divisors, whose sum is σ = 125440520. Its totient is φ = 125440518.

The previous prime is 125440493. The next prime is 125440529. The reversal of 125440519 is 915044521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125440519 - 2¹¹ = 125438471 is a prime.

It is a super-2 number, since 2×125440519² = 31470647613978722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125440529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62720259 + 62720260.

It is an arithmetic number, because the mean of its divisors is an integer number (62720260).

Almost surely, 2^125440519 is an apocalyptic number.

125440519 is a deficient number, since it is larger than the sum of its proper divisors (1).

125440519 is an equidigital number, since it uses as much as digits as its factorization.

125440519 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 125440519 is about 11200.0231696189. The cubic root of 125440519 is about 500.5866700340.

The spelling of 125440519 in words is "one hundred twenty-five million, four hundred forty thousand, five hundred nineteen".