12909746 has 4 divisors (see below), whose sum is σ = 19364622. Its totient is φ = 6454872.

The previous prime is 12909709. The next prime is 12909751. The reversal of 12909746 is 64790921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64790921 = 13 ⋅4983917.

It can be written as a sum of positive squares in only one way, i.e., 11978521 + 931225 = 3461^2 + 965^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3227435 + ... + 3227438.

Almost surely, 2^12909746 is an apocalyptic number.

12909746 is a deficient number, since it is larger than the sum of its proper divisors (6454876).

12909746 is an equidigital number, since it uses as much as digits as its factorization.

12909746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6454875.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 12909746 is about 3593.0134984439. The cubic root of 12909746 is about 234.5880575453.

The spelling of 12909746 in words is "twelve million, nine hundred nine thousand, seven hundred forty-six".