1316520 has 128 divisors (see below), whose sum is σ = 4665600. Its totient is φ = 329472.

The previous prime is 1316519. The next prime is 1316527. The reversal of 1316520 is 256131.

Added to its reverse (256131) it gives a triangular number (1572651 = T₁₇₇₃).

1316520 is a `hidden beast` number, since 13 + 1 + 652 + 0 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 1316493 and 1316502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1316527) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24814 + ... + 24866.

It is an arithmetic number, because the mean of its divisors is an integer number (36450).

2^1316520 is an apocalyptic number.

1316520 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 1316520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2332800).

1316520 is an abundant number, since it is smaller than the sum of its proper divisors (3349080).

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

1316520 is a wasteful number, since it uses less digits than its factorization.

1316520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96 (or 86 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 1316520 is about 1147.3970542057. The cubic root of 1316520 is about 109.5996465792.

Adding to 1316520 its reverse (256131), we get a triangular number (1572651 = T₁₇₇₃).

The spelling of 1316520 in words is "one million, three hundred sixteen thousand, five hundred twenty".