125111816 has 8 divisors (see below), whose sum is σ = 234584670. Its totient is φ = 62555904.

The previous prime is 125111813. The next prime is 125111821. The reversal of 125111816 is 618111521.

It can be written as a sum of positive squares in only one way, i.e., 95452900 + 29658916 = 9770^2 + 5446^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (125111813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7819481 + ... + 7819496.

Almost surely, 2^125111816 is an apocalyptic number.

It is an amenable number.

125111816 is a deficient number, since it is larger than the sum of its proper divisors (109472854).

125111816 is a wasteful number, since it uses less digits than its factorization.

125111816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15638983 (or 15638979 counting only the distinct ones).

The product of its digits is 480, while the sum is 26.

The square root of 125111816 is about 11185.3393332523. The cubic root of 125111816 is about 500.1490435676.

The spelling of 125111816 in words is "one hundred twenty-five million, one hundred eleven thousand, eight hundred sixteen".