12731058 has 30 divisors (see below), whose sum is σ = 28569099. Its totient is φ = 4097352.

The previous prime is 12731051. The next prime is 12731063. The reversal of 12731058 is 85013721.

It can be written as a sum of positive squares in 3 ways, for example, as 6985449 + 5745609 = 2643^2 + 2397^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=2523.

It is not an unprimeable number, because it can be changed into a prime (12731051) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 438988 + ... + 439016.

Almost surely, 2^12731058 is an apocalyptic number.

12731058 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12731058

12731058 is an abundant number, since it is smaller than the sum of its proper divisors (15838041).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12731058 is an frugal number, since it uses more digits than its factorization.

12731058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124 (or 34 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 12731058 is about 3568.0608178673. The cubic root of 12731058 is about 233.5006885548.

Adding to 12731058 its reverse (85013721), we get a palindrome (97744779).

The spelling of 12731058 in words is "twelve million, seven hundred thirty-one thousand, fifty-eight".