125872919 has 4 divisors (see below), whose sum is σ = 125905944. Its totient is φ = 125839896.

The previous prime is 125872889. The next prime is 125872921. The reversal of 125872919 is 919278521.

It is a happy number.

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-125872919 is a prime.

It is a super-2 number, since 2×125872919² = 31687983475161122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125872919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125872949) 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 in 3 ways as a sum of consecutive naturals, for example, 9917 + ... + 18710.

It is an arithmetic number, because the mean of its divisors is an integer number (31476486).

Almost surely, 2^125872919 is an apocalyptic number.

125872919 is a deficient number, since it is larger than the sum of its proper divisors (33025).

125872919 is an equidigital number, since it uses as much as digits as its factorization.

125872919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33024.

The product of its digits is 90720, while the sum is 44.

The square root of 125872919 is about 11219.3100946538. The cubic root of 125872919 is about 501.1611931732.

The spelling of 125872919 in words is "one hundred twenty-five million, eight hundred seventy-two thousand, nine hundred nineteen".