12478757 has 2 divisors, whose sum is σ = 12478758. Its totient is φ = 12478756.

The previous prime is 12478727. The next prime is 12478783. The reversal of 12478757 is 75787421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11621281 + 857476 = 3409^2 + 926^2 .

It is an emirp because it is prime and its reverse (75787421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12478757 - 2²² = 8284453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12478717) 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 as a sum of consecutive naturals, namely, 6239378 + 6239379.

It is an arithmetic number, because the mean of its divisors is an integer number (6239379).

Almost surely, 2^12478757 is an apocalyptic number.

It is an amenable number.

12478757 is a deficient number, since it is larger than the sum of its proper divisors (1).

12478757 is an equidigital number, since it uses as much as digits as its factorization.

12478757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 109760, while the sum is 41.

The square root of 12478757 is about 3532.5284146062. The cubic root of 12478757 is about 231.9478987739.

The spelling of 12478757 in words is "twelve million, four hundred seventy-eight thousand, seven hundred fifty-seven".