126280691 has 2 divisors, whose sum is σ = 126280692. Its totient is φ = 126280690.

The previous prime is 126280643. The next prime is 126280727. The reversal of 126280691 is 196082621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 126280691 - 2²² = 122086387 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (126280621) 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, 63140345 + 63140346.

It is an arithmetic number, because the mean of its divisors is an integer number (63140346).

Almost surely, 2^126280691 is an apocalyptic number.

126280691 is a deficient number, since it is larger than the sum of its proper divisors (1).

126280691 is an equidigital number, since it uses as much as digits as its factorization.

126280691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 126280691 is about 11237.4681757058. The cubic root of 126280691 is about 501.7017892553.

The spelling of 126280691 in words is "one hundred twenty-six million, two hundred eighty thousand, six hundred ninety-one".