12957505 has 8 divisors (see below), whose sum is σ = 16962624. Its totient is φ = 9423600.

The previous prime is 12957481. The next prime is 12957509. The reversal of 12957505 is 50575921.

12957505 is nontrivially palindromic in base 14.

12957505 is digitally balanced in base 2 and base 3, because in such bases 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 de Polignac number, because none of the positive numbers 2^k-12957505 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12957509) 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, 117741 + ... + 117850.

It is an arithmetic number, because the mean of its divisors is an integer number (2120328).

Almost surely, 2^12957505 is an apocalyptic number.

It is an amenable number.

12957505 is a deficient number, since it is larger than the sum of its proper divisors (4005119).

12957505 is a wasteful number, since it uses less digits than its factorization.

12957505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235607.

The product of its (nonzero) digits is 15750, while the sum is 34.

The square root of 12957505 is about 3599.6534555426. The cubic root of 12957505 is about 234.8769840540.

The spelling of 12957505 in words is "twelve million, nine hundred fifty-seven thousand, five hundred five".