126387493 has 2 divisors, whose sum is σ = 126387494. Its totient is φ = 126387492.

The previous prime is 126387491. The next prime is 126387509. The reversal of 126387493 is 394783621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78818884 + 47568609 = 8878^2 + 6897^2 .

It is an emirp because it is prime and its reverse (394783621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 126387493 - 2¹ = 126387491 is a prime.

Together with 126387491, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126387491) 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, 63193746 + 63193747.

It is an arithmetic number, because the mean of its divisors is an integer number (63193747).

Almost surely, 2^126387493 is an apocalyptic number.

It is an amenable number.

126387493 is a deficient number, since it is larger than the sum of its proper divisors (1).

126387493 is an equidigital number, since it uses as much as digits as its factorization.

126387493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 43.

The square root of 126387493 is about 11242.2192204209. The cubic root of 126387493 is about 501.8431876361.

The spelling of 126387493 in words is "one hundred twenty-six million, three hundred eighty-seven thousand, four hundred ninety-three".