12720072 has 32 divisors (see below), whose sum is σ = 31888800. Its totient is φ = 4228224.

The previous prime is 12720061. The next prime is 12720073. The reversal of 12720072 is 27002721.

It is not an unprimeable number, because it can be changed into a prime (12720073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14379 + ... + 15237.

It is an arithmetic number, because the mean of its divisors is an integer number (996525).

Almost surely, 2^12720072 is an apocalyptic number.

12720072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12720072 is an abundant number, since it is smaller than the sum of its proper divisors (19168728).

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

12720072 is a wasteful number, since it uses less digits than its factorization.

12720072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1485 (or 1481 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 21.

The square root of 12720072 is about 3566.5209939099. The cubic root of 12720072 is about 233.4335043823.

Adding to 12720072 its reverse (27002721), we get a palindrome (39722793).

The spelling of 12720072 in words is "twelve million, seven hundred twenty thousand, seventy-two".