126091816 has 8 divisors (see below), whose sum is σ = 236422170. Its totient is φ = 63045904.

The previous prime is 126091807. The next prime is 126091817. The reversal of 126091816 is 618190621.

It can be written as a sum of positive squares in only one way, i.e., 125664100 + 427716 = 11210^2 + 654^2 .

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 (126091817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7880731 + ... + 7880746.

Almost surely, 2^126091816 is an apocalyptic number.

It is an amenable number.

126091816 is a deficient number, since it is larger than the sum of its proper divisors (110330354).

126091816 is a wasteful number, since it uses less digits than its factorization.

126091816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15761483 (or 15761479 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 126091816 is about 11229.0612252316. The cubic root of 126091816 is about 501.4515366715.

The spelling of 126091816 in words is "one hundred twenty-six million, ninety-one thousand, eight hundred sixteen".