126016591 has 2 divisors, whose sum is σ = 126016592. Its totient is φ = 126016590.

The previous prime is 126016577. The next prime is 126016619. The reversal of 126016591 is 195610621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 126016591 - 2⁵ = 126016559 is a prime.

It is a super-2 number, since 2×126016591² = 31760362414522562, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126016511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63008295 + 63008296.

It is an arithmetic number, because the mean of its divisors is an integer number (63008296).

Almost surely, 2^126016591 is an apocalyptic number.

126016591 is a deficient number, since it is larger than the sum of its proper divisors (1).

126016591 is an equidigital number, since it uses as much as digits as its factorization.

126016591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 126016591 is about 11225.7111578733. The cubic root of 126016591 is about 501.3517966646.

The spelling of 126016591 in words is "one hundred twenty-six million, sixteen thousand, five hundred ninety-one".