126560640 has 128 divisors (see below), whose sum is σ = 417506400. Its totient is φ = 32571392.

The previous prime is 126560639. The next prime is 126560647. The reversal of 126560640 is 46065621.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 126560598 and 126560607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126560647) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 54544 + ... + 56816.

Almost surely, 2^126560640 is an apocalyptic number.

126560640 is a gapful number since it is divisible by the number (10) 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 126560640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (208753200).

126560640 is an abundant number, since it is smaller than the sum of its proper divisors (290945760).

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

126560640 is a wasteful number, since it uses less digits than its factorization.

126560640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2324 (or 2312 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 126560640 is about 11249.9173330296. The cubic root of 126560640 is about 502.0722530033.

The spelling of 126560640 in words is "one hundred twenty-six million, five hundred sixty thousand, six hundred forty".