1309716 has 48 divisors (see below), whose sum is σ = 3465280. Its totient is φ = 427680.

The previous prime is 1309709. The next prime is 1309717. The reversal of 1309716 is 6179031.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 1309716.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1309717) 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 15 ways as a sum of consecutive naturals, for example, 7146 + ... + 7326.

2^1309716 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1309716, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1732640).

1309716 is an abundant number, since it is smaller than the sum of its proper divisors (2155564).

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

1309716 is a wasteful number, since it uses less digits than its factorization.

1309716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261 (or 253 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 27.

The square root of 1309716 is about 1144.4282415250. The cubic root of 1309716 is about 109.4105104833.

It can be divided in two parts, 1309 and 716, that added together give a square (2025 = 45²).

The spelling of 1309716 in words is "one million, three hundred nine thousand, seven hundred sixteen".