125216771 has 4 divisors (see below), whose sum is σ = 125241600. Its totient is φ = 125191944.

The previous prime is 125216759. The next prime is 125216779. The reversal of 125216771 is 177612521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 177612521 = 787 ⋅225683.

It is a cyclic number.

It is not a de Polignac number, because 125216771 - 2¹⁰ = 125215747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125216779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1856 + ... + 15933.

It is an arithmetic number, because the mean of its divisors is an integer number (31310400).

Almost surely, 2^125216771 is an apocalyptic number.

125216771 is a deficient number, since it is larger than the sum of its proper divisors (24829).

125216771 is an equidigital number, since it uses as much as digits as its factorization.

125216771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24828.

The product of its digits is 5880, while the sum is 32.

The square root of 125216771 is about 11190.0299820867. The cubic root of 125216771 is about 500.2888610864.

The spelling of 125216771 in words is "one hundred twenty-five million, two hundred sixteen thousand, seven hundred seventy-one".