126481591 has 2 divisors, whose sum is σ = 126481592. Its totient is φ = 126481590.

The previous prime is 126481583. The next prime is 126481603. The reversal of 126481591 is 195184621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 126481591 - 2³ = 126481583 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 126481591.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126481541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63240795 + 63240796.

It is an arithmetic number, because the mean of its divisors is an integer number (63240796).

Almost surely, 2^126481591 is an apocalyptic number.

126481591 is a deficient number, since it is larger than the sum of its proper divisors (1).

126481591 is an equidigital number, since it uses as much as digits as its factorization.

126481591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 37.

The square root of 126481591 is about 11246.4034695542. The cubic root of 126481591 is about 501.9677008155.

The spelling of 126481591 in words is "one hundred twenty-six million, four hundred eighty-one thousand, five hundred ninety-one".