125507121 has 4 divisors (see below), whose sum is σ = 167342832. Its totient is φ = 83671412.

The previous prime is 125507119. The next prime is 125507143. The reversal of 125507121 is 121705521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 125507121 - 2¹ = 125507119 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 125507091 and 125507100.

It is not an unprimeable number, because it can be changed into a prime (125507171) 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, 20917851 + ... + 20917856.

It is an arithmetic number, because the mean of its divisors is an integer number (41835708).

Almost surely, 2^125507121 is an apocalyptic number.

It is an amenable number.

125507121 is a deficient number, since it is larger than the sum of its proper divisors (41835711).

125507121 is an equidigital number, since it uses as much as digits as its factorization.

125507121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41835710.

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

The square root of 125507121 is about 11202.9960724799. The cubic root of 125507121 is about 500.6752490004.

The spelling of 125507121 in words is "one hundred twenty-five million, five hundred seven thousand, one hundred twenty-one".