12531305 has 16 divisors (see below), whose sum is σ = 15474240. Its totient is φ = 9738432.

The previous prime is 12531301. The next prime is 12531307. The reversal of 12531305 is 50313521.

It is a cyclic number.

It is not a de Polignac number, because 12531305 - 2² = 12531301 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12531301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31367 + ... + 31763.

It is an arithmetic number, because the mean of its divisors is an integer number (967140).

Almost surely, 2^12531305 is an apocalyptic number.

It is an amenable number.

12531305 is a deficient number, since it is larger than the sum of its proper divisors (2942935).

12531305 is a wasteful number, since it uses less digits than its factorization.

12531305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 12531305 is about 3539.9583330881. The cubic root of 12531305 is about 232.2730200891.

Adding to 12531305 its reverse (50313521), we get a palindrome (62844826).

The spelling of 12531305 in words is "twelve million, five hundred thirty-one thousand, three hundred five".