126169591 has 2 divisors, whose sum is σ = 126169592. Its totient is φ = 126169590.

The previous prime is 126169583. The next prime is 126169619. The reversal of 126169591 is 195961621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 126169591 - 2³ = 126169583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126169391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63084795 + 63084796.

It is an arithmetic number, because the mean of its divisors is an integer number (63084796).

Almost surely, 2^126169591 is an apocalyptic number.

126169591 is a deficient number, since it is larger than the sum of its proper divisors (1).

126169591 is an equidigital number, since it uses as much as digits as its factorization.

126169591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29160, while the sum is 40.

The square root of 126169591 is about 11232.5238036694. The cubic root of 126169591 is about 501.5546159952.

The spelling of 126169591 in words is "one hundred twenty-six million, one hundred sixty-nine thousand, five hundred ninety-one".