125121507 has 16 divisors (see below), whose sum is σ = 190828032. Its totient is φ = 71435520.

The previous prime is 125121497. The next prime is 125121511. The reversal of 125121507 is 705121521.

It is not a de Polignac number, because 125121507 - 2¹⁸ = 124859363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125121907) 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 15 ways as a sum of consecutive naturals, for example, 33882 + ... + 37392.

It is an arithmetic number, because the mean of its divisors is an integer number (11926752).

Almost surely, 2^125121507 is an apocalyptic number.

125121507 is a deficient number, since it is larger than the sum of its proper divisors (65706525).

125121507 is a wasteful number, since it uses less digits than its factorization.

125121507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5218.

The product of its (nonzero) digits is 700, while the sum is 24.

The square root of 125121507 is about 11185.7725258473. The cubic root of 125121507 is about 500.1619568676.

The spelling of 125121507 in words is "one hundred twenty-five million, one hundred twenty-one thousand, five hundred seven".