125126407 has 4 divisors (see below), whose sum is σ = 143001616. Its totient is φ = 107251200.

The previous prime is 125126333. The next prime is 125126413. The reversal of 125126407 is 704621521.

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

It is not a de Polignac number, because 125126407 - 2¹⁹ = 124602119 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 (125126437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8937594 + ... + 8937607.

It is an arithmetic number, because the mean of its divisors is an integer number (35750404).

Almost surely, 2^125126407 is an apocalyptic number.

125126407 is a deficient number, since it is larger than the sum of its proper divisors (17875209).

125126407 is an equidigital number, since it uses as much as digits as its factorization.

125126407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17875208.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 125126407 is about 11185.9915519367. The cubic root of 125126407 is about 500.1684858853.

Adding to 125126407 its reverse (704621521), we get a palindrome (829747928).

The spelling of 125126407 in words is "one hundred twenty-five million, one hundred twenty-six thousand, four hundred seven".