12661057 has 8 divisors (see below), whose sum is σ = 12984192. Its totient is φ = 12342000.

The previous prime is 12661043. The next prime is 12661091. The reversal of 12661057 is 75016621.

12661057 is digitally balanced in base 3, 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 not a de Polignac number, because 12661057 - 2⁷ = 12660929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12661027) 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, 5832 + ... + 7702.

It is an arithmetic number, because the mean of its divisors is an integer number (1623024).

Almost surely, 2^12661057 is an apocalyptic number.

It is an amenable number.

12661057 is a deficient number, since it is larger than the sum of its proper divisors (323135).

12661057 is a wasteful number, since it uses less digits than its factorization.

12661057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2039.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 12661057 is about 3558.2379066049. The cubic root of 12661057 is about 233.0719383436.

Adding to 12661057 its reverse (75016621), we get a palindrome (87677678).

The spelling of 12661057 in words is "twelve million, six hundred sixty-one thousand, fifty-seven".