1216272 has 20 divisors (see below), whose sum is σ = 3142160. Its totient is φ = 405408.

The previous prime is 1216249. The next prime is 1216273. The reversal of 1216272 is 2726121.

It is not an unprimeable number, because it can be changed into a prime (1216273) 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, 12622 + ... + 12717.

It is an arithmetic number, because the mean of its divisors is an integer number (157108).

2^1216272 is an apocalyptic number.

1216272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1216272 is an abundant number, since it is smaller than the sum of its proper divisors (1925888).

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

1216272 is a wasteful number, since it uses less digits than its factorization.

1216272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25350 (or 25344 counting only the distinct ones).

The product of its digits is 336, while the sum is 21.

The square root of 1216272 is about 1102.8472242337. The cubic root of 1216272 is about 106.7440237464.

The spelling of 1216272 in words is "one million, two hundred sixteen thousand, two hundred seventy-two".