125776217 has 16 divisors (see below), whose sum is σ = 153135360. Its totient is φ = 100843008.

The previous prime is 125776187. The next prime is 125776241. The reversal of 125776217 is 712677521.

It is not a de Polignac number, because 125776217 - 2²⁰ = 124727641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125770217) 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, 16709 + ... + 23037.

It is an arithmetic number, because the mean of its divisors is an integer number (9570960).

Almost surely, 2^125776217 is an apocalyptic number.

125776217 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

125776217 is a deficient number, since it is larger than the sum of its proper divisors (27359143).

125776217 is a wasteful number, since it uses less digits than its factorization.

125776217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6520.

The product of its digits is 41160, while the sum is 38.

The square root of 125776217 is about 11214.9996433348. Note that the first 3 decimals coincide. The cubic root of 125776217 is about 501.0328210922.

The spelling of 125776217 in words is "one hundred twenty-five million, seven hundred seventy-six thousand, two hundred seventeen".