13121009 has 8 divisors (see below), whose sum is σ = 14345760. Its totient is φ = 11901600.

The previous prime is 13120999. The next prime is 13121033. The reversal of 13121009 is 90012131.

It is a happy number.

13121009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13121009 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13121099) 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, 5237 + ... + 7325.

It is an arithmetic number, because the mean of its divisors is an integer number (1793220).

Almost surely, 2^13121009 is an apocalyptic number.

It is an amenable number.

13121009 is a deficient number, since it is larger than the sum of its proper divisors (1224751).

13121009 is a wasteful number, since it uses less digits than its factorization.

13121009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2671.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 13121009 is about 3622.2933343394. The cubic root of 13121009 is about 235.8607876185.

The spelling of 13121009 in words is "thirteen million, one hundred twenty-one thousand, nine".