12400757 has 2 divisors, whose sum is σ = 12400758. Its totient is φ = 12400756.

The previous prime is 12400753. The next prime is 12400793. The reversal of 12400757 is 75700421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12208036 + 192721 = 3494^2 + 439^2 .

It is a cyclic number.

It is not a de Polignac number, because 12400757 - 2² = 12400753 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12400753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6200378 + 6200379.

It is an arithmetic number, because the mean of its divisors is an integer number (6200379).

Almost surely, 2^12400757 is an apocalyptic number.

It is an amenable number.

12400757 is a deficient number, since it is larger than the sum of its proper divisors (1).

12400757 is an equidigital number, since it uses as much as digits as its factorization.

12400757 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1960, while the sum is 26.

The square root of 12400757 is about 3521.4708574685. The cubic root of 12400757 is about 231.4636154210.

It can be divided in two parts, 12 and 400757, that multiplied together give a palindrome (4809084).

The spelling of 12400757 in words is "twelve million, four hundred thousand, seven hundred fifty-seven".