1306980 has 72 divisors (see below), whose sum is σ = 4068792. Its totient is φ = 339456.

The previous prime is 1306979. The next prime is 1306997. The reversal of 1306980 is 896031.

It can be written as a sum of positive squares in 4 ways, for example, as 278784 + 1028196 = 528^2 + 1014^2 .

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 23 ways as a sum of consecutive naturals, for example, 9472 + ... + 9608.

It is an arithmetic number, because the mean of its divisors is an integer number (56511).

2^1306980 is an apocalyptic number.

1306980 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 1306980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2034396).

1306980 is an abundant number, since it is smaller than the sum of its proper divisors (2761812).

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

1306980 is a wasteful number, since it uses less digits than its factorization.

1306980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205 (or 200 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 1306980 is about 1143.2322598667. The cubic root of 1306980 is about 109.3342710938.

The spelling of 1306980 in words is "one million, three hundred six thousand, nine hundred eighty".