125739719 has 4 divisors (see below), whose sum is σ = 143702544. Its totient is φ = 107776896.

The previous prime is 125739709. The next prime is 125739749. The reversal of 125739719 is 917937521.

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-125739719 is a prime.

It is a super-2 number, since 2×125739719² = 31620953868397922, 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 125739719.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125739709) 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 in 3 ways as a sum of consecutive naturals, for example, 8981402 + ... + 8981415.

It is an arithmetic number, because the mean of its divisors is an integer number (35925636).

Almost surely, 2^125739719 is an apocalyptic number.

125739719 is a deficient number, since it is larger than the sum of its proper divisors (17962825).

125739719 is an equidigital number, since it uses as much as digits as its factorization.

125739719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17962824.

The product of its digits is 119070, while the sum is 44.

The square root of 125739719 is about 11213.3723295002. The cubic root of 125739719 is about 500.9843528273.

The spelling of 125739719 in words is "one hundred twenty-five million, seven hundred thirty-nine thousand, seven hundred nineteen".