1306520 has 32 divisors (see below), whose sum is σ = 2980800. Its totient is φ = 515328.

The previous prime is 1306519. The next prime is 1306541. The reversal of 1306520 is 256031.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3377 + ... + 3743.

It is an arithmetic number, because the mean of its divisors is an integer number (93150).

2^1306520 is an apocalyptic number.

1306520 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 1306520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1490400).

1306520 is an abundant number, since it is smaller than the sum of its proper divisors (1674280).

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

1306520 is a wasteful number, since it uses less digits than its factorization.

1306520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467 (or 463 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 1306520 is about 1143.0310581957. The cubic root of 1306520 is about 109.3214426225.

The spelling of 1306520 in words is "one million, three hundred six thousand, five hundred twenty".