1213036272 has 90 divisors (see below), whose sum is σ = 3883330568. Its totient is φ = 346265856.

The previous prime is 1213036259. The next prime is 1213036277. The reversal of 1213036272 is 2726303121.

1213036272 is a `hidden beast` number, since 1 + 2 + 1 + 30 + 3 + 627 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213036277) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1105228 + ... + 1106324.

Almost surely, 2^1213036272 is an apocalyptic number.

1213036272 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 1213036272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1941665284).

1213036272 is an abundant number, since it is smaller than the sum of its proper divisors (2670294296).

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

1213036272 is an equidigital number, since it uses as much as digits as its factorization.

1213036272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2215 (or 1109 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 1213036272 is about 34828.6702588543. The cubic root of 1213036272 is about 1066.4928030859.

Adding to 1213036272 its reverse (2726303121), we get a palindrome (3939339393).

The spelling of 1213036272 in words is "one billion, two hundred thirteen million, thirty-six thousand, two hundred seventy-two".