12531493 has 8 divisors (see below), whose sum is σ = 13860728. Its totient is φ = 11254464.

The previous prime is 12531473. The next prime is 12531511. The reversal of 12531493 is 39413521.

It can be written as a sum of positive squares in 4 ways, for example, as 4133089 + 8398404 = 2033^2 + 2898^2 .

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

It is not a de Polignac number, because 12531493 - 2⁵ = 12531461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12531443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12546 + ... + 13507.

It is an arithmetic number, because the mean of its divisors is an integer number (1732591).

Almost surely, 2^12531493 is an apocalyptic number.

12531493 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12531493 is a deficient number, since it is larger than the sum of its proper divisors (1329235).

12531493 is a wasteful number, since it uses less digits than its factorization.

12531493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26103.

The product of its digits is 3240, while the sum is 28.

The square root of 12531493 is about 3539.9848869734. The cubic root of 12531493 is about 232.2741816364.

The spelling of 12531493 in words is "twelve million, five hundred thirty-one thousand, four hundred ninety-three".