125755721419 has 2 divisors, whose sum is σ = 125755721420. Its totient is φ = 125755721418.

The previous prime is 125755721389. The next prime is 125755721431. The reversal of 125755721419 is 914127557521.

It is a strong prime.

It is an emirp because it is prime and its reverse (914127557521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125755721419 - 2²¹ = 125753624267 is a prime.

It is a super-2 number, since 2×125755721419² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (125755701419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62877860709 + 62877860710.

It is an arithmetic number, because the mean of its divisors is an integer number (62877860710).

Almost surely, 2^125755721419 is an apocalyptic number.

125755721419 is a deficient number, since it is larger than the sum of its proper divisors (1).

125755721419 is an equidigital number, since it uses as much as digits as its factorization.

125755721419 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 882000, while the sum is 49.

The spelling of 125755721419 in words is "one hundred twenty-five billion, seven hundred fifty-five million, seven hundred twenty-one thousand, four hundred nineteen".