1217120 has 24 divisors (see below), whose sum is σ = 2875824. Its totient is φ = 486784.

The previous prime is 1217119. The next prime is 1217131. The reversal of 1217120 is 217121.

It is a junction number, because it is equal to n+sod(n) for n = 1217095 and 1217104.

It is a congruent number.

It is an unprimeable number.

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, 3644 + ... + 3963.

It is an arithmetic number, because the mean of its divisors is an integer number (119826).

2^1217120 is an apocalyptic number.

1217120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1217120 is an abundant number, since it is smaller than the sum of its proper divisors (1658704).

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

1217120 is an equidigital number, since it uses as much as digits as its factorization.

1217120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7622 (or 7614 counting only the distinct ones).

The product of its (nonzero) digits is 28, while the sum is 14.

The square root of 1217120 is about 1103.2316166608. The cubic root of 1217120 is about 106.7688257379.

Subtracting from 1217120 its reverse (217121), we obtain a palindrome (999999).

The spelling of 1217120 in words is "one million, two hundred seventeen thousand, one hundred twenty".