1312620 has 48 divisors (see below), whose sum is σ = 3725568. Its totient is φ = 345280.

The previous prime is 1312603. The next prime is 1312637. The reversal of 1312620 is 262131.

It is an interprime number because it is at equal distance from previous prime (1312603) and next prime (1312637).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1312620.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7777 + ... + 7943.

It is an arithmetic number, because the mean of its divisors is an integer number (77616).

2^1312620 is an apocalyptic number.

1312620 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 1312620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1862784).

1312620 is an abundant number, since it is smaller than the sum of its proper divisors (2412948).

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

1312620 is a wasteful number, since it uses less digits than its factorization.

1312620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310 (or 308 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1312620 is about 1145.6962948356. The cubic root of 1312620 is about 109.4913151720.

Adding to 1312620 its reverse (262131), we get a palindrome (1574751).

The spelling of 1312620 in words is "one million, three hundred twelve thousand, six hundred twenty".