126126591 has 16 divisors (see below), whose sum is σ = 172008576. Its totient is φ = 82177056.

The previous prime is 126126529. The next prime is 126126613. The reversal of 126126591 is 195621621.

It is not a de Polignac number, because 126126591 - 2⁷ = 126126463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126126391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43596 + ... + 46398.

It is an arithmetic number, because the mean of its divisors is an integer number (10750536).

Almost surely, 2^126126591 is an apocalyptic number.

126126591 is a deficient number, since it is larger than the sum of its proper divisors (45881985).

126126591 is a wasteful number, since it uses less digits than its factorization.

126126591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3142.

The product of its digits is 6480, while the sum is 33.

The square root of 126126591 is about 11230.6095560303. The cubic root of 126126591 is about 501.4976310571.

The spelling of 126126591 in words is "one hundred twenty-six million, one hundred twenty-six thousand, five hundred ninety-one".