12911284 has 6 divisors (see below), whose sum is σ = 22594754. Its totient is φ = 6455640.

The previous prime is 12911281. The next prime is 12911287. The reversal of 12911284 is 48211921.

It is an interprime number because it is at equal distance from previous prime (12911281) and next prime (12911287).

It can be written as a sum of positive squares in only one way, i.e., 12759184 + 152100 = 3572^2 + 390^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12911281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1613907 + ... + 1613914.

Almost surely, 2^12911284 is an apocalyptic number.

It is an amenable number.

12911284 is a deficient number, since it is larger than the sum of its proper divisors (9683470).

12911284 is a wasteful number, since it uses less digits than its factorization.

12911284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3227825 (or 3227823 counting only the distinct ones).

The product of its digits is 1152, while the sum is 28.

The square root of 12911284 is about 3593.2275185410. The cubic root of 12911284 is about 234.5973730424.

The spelling of 12911284 in words is "twelve million, nine hundred eleven thousand, two hundred eighty-four".