12720706 has 8 divisors (see below), whose sum is σ = 19266624. Its totient is φ = 6298500.

The previous prime is 12720649. The next prime is 12720707. The reversal of 12720706 is 60702721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×12720706² = 323632722276872, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12720707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30670 + ... + 31081.

It is an arithmetic number, because the mean of its divisors is an integer number (2408328).

Almost surely, 2^12720706 is an apocalyptic number.

12720706 is a deficient number, since it is larger than the sum of its proper divisors (6545918).

12720706 is a wasteful number, since it uses less digits than its factorization.

12720706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61856.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 12720706 is about 3566.6098749373. The cubic root of 12720706 is about 233.4373826198.

The spelling of 12720706 in words is "twelve million, seven hundred twenty thousand, seven hundred six".