491965142 has 16 divisors (see below), whose sum is σ = 789098112. Its totient is φ = 229219200.

The previous prime is 491965141. The next prime is 491965163. The reversal of 491965142 is 241569194.

It is a self number, because there is not a number n which added to its sum of digits gives 491965142.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491965141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68198 + ... + 75065.

It is an arithmetic number, because the mean of its divisors is an integer number (49318632).

Almost surely, 2^491965142 is an apocalyptic number.

491965142 is a deficient number, since it is larger than the sum of its proper divisors (297132970).

491965142 is a wasteful number, since it uses less digits than its factorization.

491965142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143383.

The product of its digits is 77760, while the sum is 41.

The square root of 491965142 is about 22180.2872388975. The cubic root of 491965142 is about 789.4260329117.

The spelling of 491965142 in words is "four hundred ninety-one million, nine hundred sixty-five thousand, one hundred forty-two".