1213272 has 64 divisors (see below), whose sum is σ = 3477600. Its totient is φ = 391680.

The previous prime is 1213271. The next prime is 1213301. The reversal of 1213272 is 2723121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8788 + ... + 8924.

2^1213272 is an apocalyptic number.

1213272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1213272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1738800).

1213272 is an abundant number, since it is smaller than the sum of its proper divisors (2264328).

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

1213272 is a wasteful number, since it uses less digits than its factorization.

1213272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193 (or 183 counting only the distinct ones).

The product of its digits is 168, while the sum is 18.

The square root of 1213272 is about 1101.4862686389. The cubic root of 1213272 is about 106.6561882068.

Adding to 1213272 its reverse (2723121), we get a palindrome (3936393).

It can be divided in two parts, 1213 and 272, that added together give a triangular number (1485 = T₅₄).

The spelling of 1213272 in words is "one million, two hundred thirteen thousand, two hundred seventy-two".