491234121 has 24 divisors (see below), whose sum is σ = 813410624. Its totient is φ = 279845280.

The previous prime is 491234119. The next prime is 491234209. The reversal of 491234121 is 121432194.

It is a happy number.

It is not a de Polignac number, because 491234121 - 2¹ = 491234119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491234101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9075 + ... + 32631.

Almost surely, 2^491234121 is an apocalyptic number.

It is an amenable number.

491234121 is a deficient number, since it is larger than the sum of its proper divisors (322176503).

491234121 is a wasteful number, since it uses less digits than its factorization.

491234121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23901 (or 23898 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 491234121 is about 22163.8020429709. The cubic root of 491234121 is about 789.0348310222.

The spelling of 491234121 in words is "four hundred ninety-one million, two hundred thirty-four thousand, one hundred twenty-one".