1217272 has 16 divisors (see below), whose sum is σ = 2608560. Its totient is φ = 521664.

The previous prime is 1217269. The next prime is 1217297. The reversal of 1217272 is 2727121.

It is a super-2 number, since 2×1217272² = 2963502243968, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10813 + ... + 10924.

It is an arithmetic number, because the mean of its divisors is an integer number (163035).

2^1217272 is an apocalyptic number.

It is an amenable number.

1217272 is an abundant number, since it is smaller than the sum of its proper divisors (1391288).

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

1217272 is a wasteful number, since it uses less digits than its factorization.

1217272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21750 (or 21746 counting only the distinct ones).

The product of its digits is 392, while the sum is 22.

The square root of 1217272 is about 1103.3005030362. The cubic root of 1217272 is about 106.7732701603.

The spelling of 1217272 in words is "one million, two hundred seventeen thousand, two hundred seventy-two".