126440256 has 56 divisors (see below), whose sum is σ = 339567520. Its totient is φ = 41513472.

The previous prime is 126440219. The next prime is 126440263. The reversal of 126440256 is 652044621.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7950 + ... + 17778.

Almost surely, 2^126440256 is an apocalyptic number.

126440256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 126440256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169783760).

126440256 is an abundant number, since it is smaller than the sum of its proper divisors (213127264).

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

126440256 is an equidigital number, since it uses as much as digits as its factorization.

126440256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9911 (or 9901 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 126440256 is about 11244.5656207788. The cubic root of 126440256 is about 501.9130127631.

Adding to 126440256 its reverse (652044621), we get a palindrome (778484877).

The spelling of 126440256 in words is "one hundred twenty-six million, four hundred forty thousand, two hundred fifty-six".