1317220 has 24 divisors (see below), whose sum is σ = 2810304. Its totient is φ = 518496.

The previous prime is 1317193. The next prime is 1317223. The reversal of 1317220 is 227131.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1317194 and 1317203.

It is not an unprimeable number, because it can be changed into a prime (1317223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 849 + ... + 1831.

It is an arithmetic number, because the mean of its divisors is an integer number (117096).

2^1317220 is an apocalyptic number.

1317220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1317220 is an abundant number, since it is smaller than the sum of its proper divisors (1493084).

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

1317220 is a wasteful number, since it uses less digits than its factorization.

1317220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059 (or 1057 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 1317220 is about 1147.7020519281. The cubic root of 1317220 is about 109.6190680234.

The spelling of 1317220 in words is "one million, three hundred seventeen thousand, two hundred twenty".