12909057 has 8 divisors (see below), whose sum is σ = 19670976. Its totient is φ = 7376592.

The previous prime is 12909047. The next prime is 12909077. The reversal of 12909057 is 75090921.

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

It is not a de Polignac number, because 12909057 - 2⁶ = 12908993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12909047) 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, 307338 + ... + 307379.

It is an arithmetic number, because the mean of its divisors is an integer number (2458872).

Almost surely, 2^12909057 is an apocalyptic number.

It is an amenable number.

12909057 is a deficient number, since it is larger than the sum of its proper divisors (6761919).

12909057 is an equidigital number, since it uses as much as digits as its factorization.

12909057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614727.

The product of its (nonzero) digits is 5670, while the sum is 33.

The square root of 12909057 is about 3592.9176166453. The cubic root of 12909057 is about 234.5838841079.

Adding to 12909057 its reverse (75090921), we get a palindrome (87999978).

The spelling of 12909057 in words is "twelve million, nine hundred nine thousand, fifty-seven".