12961861 has 8 divisors (see below), whose sum is σ = 14311584. Its totient is φ = 11640720.

The previous prime is 12961849. The next prime is 12961867. The reversal of 12961861 is 16816921.

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 12961861 - 2⁹ = 12961349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12961867) 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, 6186 + ... + 8011.

It is an arithmetic number, because the mean of its divisors is an integer number (1788948).

Almost surely, 2^12961861 is an apocalyptic number.

12961861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12961861 is a deficient number, since it is larger than the sum of its proper divisors (1349723).

12961861 is a wasteful number, since it uses less digits than its factorization.

12961861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14291.

The product of its digits is 5184, while the sum is 34.

The square root of 12961861 is about 3600.2584629440. The cubic root of 12961861 is about 234.9033010936.

The spelling of 12961861 in words is "twelve million, nine hundred sixty-one thousand, eight hundred sixty-one".