126275491 has 2 divisors, whose sum is σ = 126275492. Its totient is φ = 126275490.

The previous prime is 126275489. The next prime is 126275533. The reversal of 126275491 is 194572621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 126275491 - 2¹ = 126275489 is a prime.

Together with 126275489, it forms a pair of twin primes.

It is equal to p_7178617 and since 126275491 and 7178617 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 126275491.

It is not a weakly prime, because it can be changed into another prime (126270491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63137745 + 63137746.

It is an arithmetic number, because the mean of its divisors is an integer number (63137746).

Almost surely, 2^126275491 is an apocalyptic number.

126275491 is a deficient number, since it is larger than the sum of its proper divisors (1).

126275491 is an equidigital number, since it uses as much as digits as its factorization.

126275491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 37.

The square root of 126275491 is about 11237.2368044818. The cubic root of 126275491 is about 501.6949027839.

The spelling of 126275491 in words is "one hundred twenty-six million, two hundred seventy-five thousand, four hundred ninety-one".