12991034 has 16 divisors (see below), whose sum is σ = 22353408. Its totient is φ = 5546832.

The previous prime is 12990979. The next prime is 12991037. The reversal of 12991034 is 43019921.

It is a happy number.

12991034 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

12991034 is strictly pandigital in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 12990988 and 12991006.

It is not an unprimeable number, because it can be changed into a prime (12991037) 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, 2519 + ... + 5685.

It is an arithmetic number, because the mean of its divisors is an integer number (1397088).

Almost surely, 2^12991034 is an apocalyptic number.

12991034 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

12991034 is a deficient number, since it is larger than the sum of its proper divisors (9362374).

12991034 is a wasteful number, since it uses less digits than its factorization.

12991034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3469.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 12991034 is about 3604.3077005161. The cubic root of 12991034 is about 235.0793997583.

The spelling of 12991034 in words is "twelve million, nine hundred ninety-one thousand, thirty-four".