1310220 has 72 divisors (see below), whose sum is σ = 4127760. Its totient is φ = 336000.

The previous prime is 1310209. The next prime is 1310233. The reversal of 1310220 is 220131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5095 + ... + 5345.

It is an arithmetic number, because the mean of its divisors is an integer number (57330).

2^1310220 is an apocalyptic number.

1310220 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 1310220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2063880).

1310220 is an abundant number, since it is smaller than the sum of its proper divisors (2817540).

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

1310220 is a wasteful number, since it uses less digits than its factorization.

1310220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295 (or 290 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 1310220 is about 1144.6484176375. The cubic root of 1310220 is about 109.4245429976.

Adding to 1310220 its reverse (220131), we get a palindrome (1530351).

The spelling of 1310220 in words is "one million, three hundred ten thousand, two hundred twenty".