1001380 has 12 divisors (see below), whose sum is σ = 2102940. Its totient is φ = 400544.

The previous prime is 1001369. The next prime is 1001381. The reversal of 1001380 is 831001.

It can be written as a sum of positive squares in 2 ways, for example, as 541696 + 459684 = 736^2 + 678^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1001380.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001381) 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 3 ways as a sum of consecutive naturals, for example, 25015 + ... + 25054.

It is an arithmetic number, because the mean of its divisors is an integer number (175245).

2^1001380 is an apocalyptic number.

1001380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001380 is an abundant number, since it is smaller than the sum of its proper divisors (1101560).

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

1001380 is a wasteful number, since it uses less digits than its factorization.

1001380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50078 (or 50076 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1001380 is about 1000.6897621141. The cubic root of 1001380 is about 100.0459788562.

Adding to 1001380 its reverse (831001), we get a palindrome (1832381).

The spelling of 1001380 in words is "one million, one thousand, three hundred eighty".