10001280 has 64 divisors (see below), whose sum is σ = 31885200. Its totient is φ = 2666496.

The previous prime is 10001269. The next prime is 10001281. The reversal of 10001280 is 8210001.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10001281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 685 + ... + 4524.

Almost surely, 2^10001280 is an apocalyptic number.

10001280 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 10001280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15942600).

10001280 is an abundant number, since it is smaller than the sum of its proper divisors (21883920).

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

10001280 is an equidigital number, since it uses as much as digits as its factorization.

10001280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5231 (or 5219 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 10001280 is about 3162.4800394627. The cubic root of 10001280 is about 215.4526608657.

Adding to 10001280 its reverse (8210001), we get a palindrome (18211281).

The spelling of 10001280 in words is "ten million, one thousand, two hundred eighty".