1312520 has 64 divisors (see below), whose sum is σ = 3412800. Its totient is φ = 449280.

The previous prime is 1312517. The next prime is 1312523. The reversal of 1312520 is 252131.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1312517) and next prime (1312523).

It is a junction number, because it is equal to n+sod(n) for n = 1312495 and 1312504.

It is not an unprimeable number, because it can be changed into a prime (1312523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8282 + ... + 8438.

It is an arithmetic number, because the mean of its divisors is an integer number (53325).

2^1312520 is an apocalyptic number.

1312520 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 1312520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1706400).

1312520 is an abundant number, since it is smaller than the sum of its proper divisors (2100280).

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

1312520 is a wasteful number, since it uses less digits than its factorization.

1312520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198 (or 194 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 1312520 is about 1145.6526524213. The cubic root of 1312520 is about 109.4885346238.

Adding to 1312520 its reverse (252131), we get a palindrome (1564651).

The spelling of 1312520 in words is "one million, three hundred twelve thousand, five hundred twenty".