12931577 has 8 divisors (see below), whose sum is σ = 13774536. Its totient is φ = 12097792.

The previous prime is 12931553. The next prime is 12931591. The reversal of 12931577 is 77513921.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6270016 + 6661561 = 2504^2 + 2581^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12931577 - 2¹⁶ = 12866041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12933577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 743 + ... + 5139.

It is an arithmetic number, because the mean of its divisors is an integer number (1721817).

Almost surely, 2^12931577 is an apocalyptic number.

12931577 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

12931577 is a deficient number, since it is larger than the sum of its proper divisors (842959).

12931577 is a wasteful number, since it uses less digits than its factorization.

12931577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4587.

The product of its digits is 13230, while the sum is 35.

The square root of 12931577 is about 3596.0501943104. The cubic root of 12931577 is about 234.7202162986.

The spelling of 12931577 in words is "twelve million, nine hundred thirty-one thousand, five hundred seventy-seven".