12072740 has 24 divisors (see below), whose sum is σ = 25703160. Its totient is φ = 4762368.

The previous prime is 12072721. The next prime is 12072743. The reversal of 12072740 is 4727021.

It can be written as a sum of positive squares in 4 ways, for example, as 3904576 + 8168164 = 1976^2 + 2858^2 .

It is a super-2 number, since 2×12072740² = 291502102215200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12072743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2675 + ... + 5594.

It is an arithmetic number, because the mean of its divisors is an integer number (1070965).

Almost surely, 2^12072740 is an apocalyptic number.

12072740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12072740 is an abundant number, since it is smaller than the sum of its proper divisors (13630420).

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

12072740 is a wasteful number, since it uses less digits than its factorization.

12072740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8351 (or 8349 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 12072740 is about 3474.5848672899. The cubic root of 12072740 is about 229.4045086978.

Adding to 12072740 its reverse (4727021), we get a palindrome (16799761).

The spelling of 12072740 in words is "twelve million, seventy-two thousand, seven hundred forty".