1306620 has 144 divisors (see below), whose sum is σ = 4874688. Its totient is φ = 276480.

The previous prime is 1306601. The next prime is 1306633. The reversal of 1306620 is 266031.

Added to its reverse (266031) it gives a triangular number (1572651 = T₁₇₇₃).

It is a happy number.

1306620 is a `hidden beast` number, since 1 + 3 + 0 + 662 + 0 = 666.

1306620 is nontrivially palindromic in base 13.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a zygodrome in base 6.

It is a junction number, because it is equal to n+sod(n) for n = 1306593 and 1306602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21390 + ... + 21450.

It is an arithmetic number, because the mean of its divisors is an integer number (33852).

2^1306620 is an apocalyptic number.

1306620 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 1306620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2437344).

1306620 is an abundant number, since it is smaller than the sum of its proper divisors (3568068).

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

1306620 is a wasteful number, since it uses less digits than its factorization.

1306620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100 (or 95 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1306620 is about 1143.0748007020. The cubic root of 1306620 is about 109.3242316767.

Adding to 1306620 its reverse (266031), we get a triangular number (1572651 = T₁₇₇₃).

The spelling of 1306620 in words is "one million, three hundred six thousand, six hundred twenty".