126249816 has 128 divisors (see below), whose sum is σ = 401241600. Its totient is φ = 32148480.

The previous prime is 126249797. The next prime is 126249839. The reversal of 126249816 is 618942621.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 97300 + ... + 98588.

It is an arithmetic number, because the mean of its divisors is an integer number (3134700).

Almost surely, 2^126249816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 126249816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (200620800).

126249816 is an abundant number, since it is smaller than the sum of its proper divisors (274991784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

126249816 is a wasteful number, since it uses less digits than its factorization.

126249816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1369 (or 1365 counting only the distinct ones).

The product of its digits is 41472, while the sum is 39.

The square root of 126249816 is about 11236.0943392266. The cubic root of 126249816 is about 501.6608980596.

It can be divided in two parts, 126 and 249816, that added together give a palindrome (249942).

The spelling of 126249816 in words is "one hundred twenty-six million, two hundred forty-nine thousand, eight hundred sixteen".