12128497 has 8 divisors (see below), whose sum is σ = 13155912. Its totient is φ = 11136000.

The previous prime is 12128483. The next prime is 12128507. The reversal of 12128497 is 79482121.

It can be written as a sum of positive squares in 4 ways, for example, as 1079521 + 11048976 = 1039^2 + 3324^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12128497 - 2¹¹ = 12126449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12128477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8004 + ... + 9397.

It is an arithmetic number, because the mean of its divisors is an integer number (1644489).

Almost surely, 2^12128497 is an apocalyptic number.

12128497 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

12128497 is a deficient number, since it is larger than the sum of its proper divisors (1027415).

12128497 is a wasteful number, since it uses less digits than its factorization.

12128497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17459.

The product of its digits is 8064, while the sum is 34.

The square root of 12128497 is about 3482.5991730315. The cubic root of 12128497 is about 229.7571286304.

The spelling of 12128497 in words is "twelve million, one hundred twenty-eight thousand, four hundred ninety-seven".