1216120 has 16 divisors (see below), whose sum is σ = 2736360. Its totient is φ = 486432.

The previous prime is 1216109. The next prime is 1216123. The reversal of 1216120 is 216121.

It is a self number, because there is not a number n which added to its sum of digits gives 1216120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15162 + ... + 15241.

2^1216120 is an apocalyptic number.

1216120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1216120 is an abundant number, since it is smaller than the sum of its proper divisors (1520240).

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

1216120 is a wasteful number, since it uses less digits than its factorization.

1216120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30414 (or 30410 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1216120 is about 1102.7783095437. The cubic root of 1216120 is about 106.7395768882.

Subtracting from 1216120 its reverse (216121), we obtain a palindrome (999999).

It can be divided in two parts, 121 and 6120, that added together give a square (6241 = 79²).

The spelling of 1216120 in words is "one million, two hundred sixteen thousand, one hundred twenty".