12961906 has 8 divisors (see below), whose sum is σ = 20070144. Its totient is φ = 6271860.

The previous prime is 12961901. The next prime is 12961913. The reversal of 12961906 is 60916921.

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

It is a super-2 number, since 2×12961906² = 336022014305672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12961901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104470 + ... + 104593.

It is an arithmetic number, because the mean of its divisors is an integer number (2508768).

Almost surely, 2^12961906 is an apocalyptic number.

12961906 is a deficient number, since it is larger than the sum of its proper divisors (7108238).

12961906 is a wasteful number, since it uses less digits than its factorization.

12961906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209096.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 12961906 is about 3600.2647124899. The cubic root of 12961906 is about 234.9035729330.

The spelling of 12961906 in words is "twelve million, nine hundred sixty-one thousand, nine hundred six".