12531505 has 16 divisors (see below), whose sum is σ = 17539200. Its totient is φ = 8591856.

The previous prime is 12531473. The next prime is 12531511. The reversal of 12531505 is 50513521.

It is not a de Polignac number, because 12531505 - 2⁵ = 12531473 is a prime.

It is a plaindrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1939 + ... + 5368.

It is an arithmetic number, because the mean of its divisors is an integer number (1096200).

Almost surely, 2^12531505 is an apocalyptic number.

It is an amenable number.

12531505 is a deficient number, since it is larger than the sum of its proper divisors (5007695).

12531505 is an frugal number, since it uses more digits than its factorization.

12531505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7333 (or 7319 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 12531505 is about 3539.9865818955. The cubic root of 12531505 is about 232.2742557773.

The spelling of 12531505 in words is "twelve million, five hundred thirty-one thousand, five hundred five".