12449061257 has 6 divisors (see below), whose sum is σ = 13181846094. Its totient is φ = 11716330560.

The previous prime is 12449061253. The next prime is 12449061263. The reversal of 12449061257 is 75216094421.

It can be written as a sum of positive squares in 3 ways, for example, as 148254976 + 12300806281 = 12176^2 + 110909^2 .

It is not a de Polignac number, because 12449061257 - 2² = 12449061253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12449061253) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 446507 + ... + 473567.

It is an arithmetic number, because the mean of its divisors is an integer number (2196974349).

Almost surely, 2^12449061257 is an apocalyptic number.

12449061257 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

12449061257 is a deficient number, since it is larger than the sum of its proper divisors (732784837).

12449061257 is an frugal number, since it uses more digits than its factorization.

12449061257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54139 (or 27078 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 41.

The spelling of 12449061257 in words is "twelve billion, four hundred forty-nine million, sixty-one thousand, two hundred fifty-seven".