125217407 has 4 divisors (see below), whose sum is σ = 143105616. Its totient is φ = 107329200.

The previous prime is 125217383. The next prime is 125217413. The reversal of 125217407 is 704712521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 125217407 - 2¹⁰ = 125216383 is a prime.

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 125217407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125217437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8944094 + ... + 8944107.

It is an arithmetic number, because the mean of its divisors is an integer number (35776404).

Almost surely, 2^125217407 is an apocalyptic number.

125217407 is a deficient number, since it is larger than the sum of its proper divisors (17888209).

125217407 is an equidigital number, since it uses as much as digits as its factorization.

125217407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17888208.

The product of its (nonzero) digits is 3920, while the sum is 29.

The square root of 125217407 is about 11190.0584002051. The cubic root of 125217407 is about 500.2897081060.

Adding to 125217407 its reverse (704712521), we get a palindrome (829929928).

The spelling of 125217407 in words is "one hundred twenty-five million, two hundred seventeen thousand, four hundred seven".