12129274 has 4 divisors (see below), whose sum is σ = 18193914. Its totient is φ = 6064636.

The previous prime is 12129259. The next prime is 12129283. The reversal of 12129274 is 47292121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6723649 + 5405625 = 2593^2 + 2325^2 .

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3032317 + ... + 3032320.

Almost surely, 2^12129274 is an apocalyptic number.

12129274 is a deficient number, since it is larger than the sum of its proper divisors (6064640).

12129274 is an equidigital number, since it uses as much as digits as its factorization.

12129274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6064639.

The product of its digits is 2016, while the sum is 28.

The square root of 12129274 is about 3482.7107258571. The cubic root of 12129274 is about 229.7620349123.

It can be divided in two parts, 12129 and 274, that added together give a triangular number (12403 = T₁₅₇).

The spelling of 12129274 in words is "twelve million, one hundred twenty-nine thousand, two hundred seventy-four".