12972905 has 8 divisors (see below), whose sum is σ = 16982784. Its totient is φ = 9434800.

The previous prime is 12972901. The next prime is 12972929. The reversal of 12972905 is 50927921.

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

It is not a de Polignac number, because 12972905 - 2² = 12972901 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12972901) 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, 117881 + ... + 117990.

It is an arithmetic number, because the mean of its divisors is an integer number (2122848).

Almost surely, 2^12972905 is an apocalyptic number.

It is an amenable number.

12972905 is a deficient number, since it is larger than the sum of its proper divisors (4009879).

12972905 is a wasteful number, since it uses less digits than its factorization.

12972905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235887.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 12972905 is about 3601.7919151445. The cubic root of 12972905 is about 234.9699976788.

The spelling of 12972905 in words is "twelve million, nine hundred seventy-two thousand, nine hundred five".