12607921 has 8 divisors (see below), whose sum is σ = 12858560. Its totient is φ = 12359952.

The previous prime is 12607919. The next prime is 12607927. The reversal of 12607921 is 12970621.

It is a happy number.

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 12607921 - 2¹ = 12607919 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12607921.

It is not an unprimeable number, because it can be changed into a prime (12607927) 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, 10666 + ... + 11788.

It is an arithmetic number, because the mean of its divisors is an integer number (1607320).

Almost surely, 2^12607921 is an apocalyptic number.

12607921 is the 2246-th heptagonal number.

It is an amenable number.

12607921 is a deficient number, since it is larger than the sum of its proper divisors (250639).

12607921 is a wasteful number, since it uses less digits than its factorization.

12607921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1335.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 12607921 is about 3550.7634390367. The cubic root of 12607921 is about 232.7454285809.

The spelling of 12607921 in words is "twelve million, six hundred seven thousand, nine hundred twenty-one".