12991802 has 8 divisors (see below), whose sum is σ = 19677216. Its totient is φ = 6432732.

The previous prime is 12991799. The next prime is 12991807. The reversal of 12991802 is 20819921.

It is a happy number.

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 (12991807) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 31328 + ... + 31739.

It is an arithmetic number, because the mean of its divisors is an integer number (2459652).

Almost surely, 2^12991802 is an apocalyptic number.

12991802 is a deficient number, since it is larger than the sum of its proper divisors (6685414).

12991802 is a wasteful number, since it uses less digits than its factorization.

12991802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63172.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 12991802 is about 3604.4142381252. The cubic root of 12991802 is about 235.0840321178.

The spelling of 12991802 in words is "twelve million, nine hundred ninety-one thousand, eight hundred two".