12531290 has 16 divisors (see below), whose sum is σ = 22667040. Its totient is φ = 4987920.

The previous prime is 12531283. The next prime is 12531301. The reversal of 12531290 is 9213521.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 860 + ... + 5079.

It is an arithmetic number, because the mean of its divisors is an integer number (1416690).

Almost surely, 2^12531290 is an apocalyptic number.

12531290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12531290 is a deficient number, since it is larger than the sum of its proper divisors (10135750).

12531290 is a wasteful number, since it uses less digits than its factorization.

12531290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6157.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 12531290 is about 3539.9562144185. The cubic root of 12531290 is about 232.2729274120.

It can be divided in two parts, 12531 and 290, that added together give a palindrome (12821).

The spelling of 12531290 in words is "twelve million, five hundred thirty-one thousand, two hundred ninety".