125651599 has 12 divisors (see below), whose sum is σ = 133210224. Its totient is φ = 118297344.

The previous prime is 125651597. The next prime is 125651609. The reversal of 125651599 is 995156521.

It is not a de Polignac number, because 125651599 - 2¹ = 125651597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125651597) 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 11 ways as a sum of consecutive naturals, for example, 102639 + ... + 103855.

It is an arithmetic number, because the mean of its divisors is an integer number (11100852).

Almost surely, 2^125651599 is an apocalyptic number.

125651599 is a deficient number, since it is larger than the sum of its proper divisors (7558625).

125651599 is an equidigital number, since it uses as much as digits as its factorization.

125651599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1374 (or 1307 counting only the distinct ones).

The product of its digits is 121500, while the sum is 43.

The square root of 125651599 is about 11209.4424036167. The cubic root of 125651599 is about 500.8672934011.

The spelling of 125651599 in words is "one hundred twenty-five million, six hundred fifty-one thousand, five hundred ninety-nine".