126489637 has 2 divisors, whose sum is σ = 126489638. Its totient is φ = 126489636.

The previous prime is 126489607. The next prime is 126489653. The reversal of 126489637 is 736984621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103917636 + 22572001 = 10194^2 + 4751^2 .

It is an emirp because it is prime and its reverse (736984621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 126489637 - 2²³ = 118101029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126489607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63244818 + 63244819.

It is an arithmetic number, because the mean of its divisors is an integer number (63244819).

Almost surely, 2^126489637 is an apocalyptic number.

It is an amenable number.

126489637 is a deficient number, since it is larger than the sum of its proper divisors (1).

126489637 is an equidigital number, since it uses as much as digits as its factorization.

126489637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 46.

The square root of 126489637 is about 11246.7611782237. The cubic root of 126489637 is about 501.9783446477.

The spelling of 126489637 in words is "one hundred twenty-six million, four hundred eighty-nine thousand, six hundred thirty-seven".