12901009 has 4 divisors (see below), whose sum is σ = 14073840. Its totient is φ = 11728180.

The previous prime is 12901001. The next prime is 12901037. The reversal of 12901009 is 90010921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12901009 - 2³ = 12901001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12901001) 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 3 ways as a sum of consecutive naturals, for example, 586399 + ... + 586420.

It is an arithmetic number, because the mean of its divisors is an integer number (3518460).

Almost surely, 2^12901009 is an apocalyptic number.

It is an amenable number.

12901009 is a deficient number, since it is larger than the sum of its proper divisors (1172831).

12901009 is a wasteful number, since it uses less digits than its factorization.

12901009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1172830.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 12901009 is about 3591.7974608822. The cubic root of 12901009 is about 234.5351244510.

The spelling of 12901009 in words is "twelve million, nine hundred one thousand, nine".