126188491 has 16 divisors (see below), whose sum is σ = 149734368. Its totient is φ = 104832000.

The previous prime is 126188479. The next prime is 126188497. The reversal of 126188491 is 194881621.

It is not a de Polignac number, because 126188491 - 2⁵ = 126188459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126188497) 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 in 15 ways as a sum of consecutive naturals, for example, 10075 + ... + 18811.

It is an arithmetic number, because the mean of its divisors is an integer number (9358398).

Almost surely, 2^126188491 is an apocalyptic number.

126188491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

126188491 is a deficient number, since it is larger than the sum of its proper divisors (23545877).

126188491 is a wasteful number, since it uses less digits than its factorization.

126188491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8862.

The product of its digits is 27648, while the sum is 40.

The square root of 126188491 is about 11233.3650790847. The cubic root of 126188491 is about 501.5796587673.

The spelling of 126188491 in words is "one hundred twenty-six million, one hundred eighty-eight thousand, four hundred ninety-one".