12543653 has 2 divisors, whose sum is σ = 12543654. Its totient is φ = 12543652.

The previous prime is 12543647. The next prime is 12543677. The reversal of 12543653 is 35634521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11710084 + 833569 = 3422^2 + 913^2 .

It is a cyclic number.

It is not a de Polignac number, because 12543653 - 2⁶ = 12543589 is a prime.

It is equal to p₈₂₁₃₆₉ and since 12543653 and 821369 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12543683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6271826 + 6271827.

It is an arithmetic number, because the mean of its divisors is an integer number (6271827).

Almost surely, 2^12543653 is an apocalyptic number.

It is an amenable number.

12543653 is a deficient number, since it is larger than the sum of its proper divisors (1).

12543653 is an equidigital number, since it uses as much as digits as its factorization.

12543653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 29.

The square root of 12543653 is about 3541.7019919807. The cubic root of 12543653 is about 232.3492868391.

The spelling of 12543653 in words is "twelve million, five hundred forty-three thousand, six hundred fifty-three".