12720577 has 8 divisors (see below), whose sum is σ = 13032000. Its totient is φ = 12412464.

The previous prime is 12720569. The next prime is 12720581. The reversal of 12720577 is 77502721.

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

It is a cyclic number.

It is not a de Polignac number, because 12720577 - 2³ = 12720569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12720077) 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, 8068 + ... + 9514.

It is an arithmetic number, because the mean of its divisors is an integer number (1629000).

Almost surely, 2^12720577 is an apocalyptic number.

It is an amenable number.

12720577 is a deficient number, since it is larger than the sum of its proper divisors (311423).

12720577 is a wasteful number, since it uses less digits than its factorization.

12720577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1655.

The product of its (nonzero) digits is 6860, while the sum is 31.

The square root of 12720577 is about 3566.5917904913. The cubic root of 12720577 is about 233.4365935251.

The spelling of 12720577 in words is "twelve million, seven hundred twenty thousand, five hundred seventy-seven".