491345252 has 6 divisors (see below), whose sum is σ = 859854198. Its totient is φ = 245672624.

The previous prime is 491345243. The next prime is 491345273. The reversal of 491345252 is 252543194.

It can be written as a sum of positive squares in only one way, i.e., 356227876 + 135117376 = 18874^2 + 11624^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61418153 + ... + 61418160.

It is an arithmetic number, because the mean of its divisors is an integer number (143309033).

Almost surely, 2^491345252 is an apocalyptic number.

It is an amenable number.

491345252 is a deficient number, since it is larger than the sum of its proper divisors (368508946).

491345252 is a wasteful number, since it uses less digits than its factorization.

491345252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122836317 (or 122836315 counting only the distinct ones).

The product of its digits is 43200, while the sum is 35.

The square root of 491345252 is about 22166.3089394694. The cubic root of 491345252 is about 789.0943271732.

The spelling of 491345252 in words is "four hundred ninety-one million, three hundred forty-five thousand, two hundred fifty-two".