13129906 has 8 divisors (see below), whose sum is σ = 19722780. Its totient is φ = 6555648.

The previous prime is 13129901. The next prime is 13129927. The reversal of 13129906 is 60992131.

It can be written as a sum of positive squares in 2 ways, for example, as 12780625 + 349281 = 3575^2 + 591^2 .

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

It is not an unprimeable number, because it can be changed into a prime (13129901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2731 + ... + 5806.

Almost surely, 2^13129906 is an apocalyptic number.

13129906 is a deficient number, since it is larger than the sum of its proper divisors (6592874).

13129906 is an equidigital number, since it uses as much as digits as its factorization.

13129906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9308.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 13129906 is about 3623.5212156133. The cubic root of 13129906 is about 235.9140858393.

The spelling of 13129906 in words is "thirteen million, one hundred twenty-nine thousand, nine hundred six".