12721974 has 8 divisors (see below), whose sum is σ = 25443960. Its totient is φ = 4240656.

The previous prime is 12721939. The next prime is 12721999. The reversal of 12721974 is 47912721.

12721974 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

12721974 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1060159 + ... + 1060170.

It is an arithmetic number, because the mean of its divisors is an integer number (3180495).

Almost surely, 2^12721974 is an apocalyptic number.

12721974 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12721974 is a wasteful number, since it uses less digits than its factorization.

12721974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2120334.

The product of its digits is 7056, while the sum is 33.

The square root of 12721974 is about 3566.7876303475. The cubic root of 12721974 is about 233.4451387084.

It can be divided in two parts, 12721 and 974, that added together give a triangular number (13695 = T₁₆₅).

The spelling of 12721974 in words is "twelve million, seven hundred twenty-one thousand, nine hundred seventy-four".