1315220 has 12 divisors (see below), whose sum is σ = 2762004. Its totient is φ = 526080.

The previous prime is 1315213. The next prime is 1315229. The reversal of 1315220 is 225131.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 988036 + 327184 = 994^2 + 572^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1315195 and 1315204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1315229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32861 + ... + 32900.

It is an arithmetic number, because the mean of its divisors is an integer number (230167).

2^1315220 is an apocalyptic number.

1315220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1315220 is an abundant number, since it is smaller than the sum of its proper divisors (1446784).

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

1315220 is a wasteful number, since it uses less digits than its factorization.

1315220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65770 (or 65768 counting only the distinct ones).

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

The square root of 1315220 is about 1146.8304146647. The cubic root of 1315220 is about 109.5635599104.

The spelling of 1315220 in words is "one million, three hundred fifteen thousand, two hundred twenty".