491172126 has 32 divisors (see below), whose sum is σ = 1047751200. Its totient is φ = 152964096.

The previous prime is 491172047. The next prime is 491172127. The reversal of 491172126 is 621271194.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491172127) 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, 3601 + ... + 31548.

It is an arithmetic number, because the mean of its divisors is an integer number (32742225).

Almost surely, 2^491172126 is an apocalyptic number.

491172126 is an abundant number, since it is smaller than the sum of its proper divisors (556579074).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

491172126 is a wasteful number, since it uses less digits than its factorization.

491172126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35308.

The product of its digits is 6048, while the sum is 33.

The square root of 491172126 is about 22162.4034346458. The cubic root of 491172126 is about 789.0016368892.

The spelling of 491172126 in words is "four hundred ninety-one million, one hundred seventy-two thousand, one hundred twenty-six".