491322842 has 4 divisors (see below), whose sum is σ = 736984266. Its totient is φ = 245661420.

The previous prime is 491322827. The next prime is 491322847. The reversal of 491322842 is 248223194.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 388523521 + 102799321 = 19711^2 + 10139^2 .

It is not an unprimeable number, because it can be changed into a prime (491322847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122830709 + ... + 122830712.

Almost surely, 2^491322842 is an apocalyptic number.

491322842 is a deficient number, since it is larger than the sum of its proper divisors (245661424).

491322842 is a wasteful number, since it uses less digits than its factorization.

491322842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245661423.

The product of its digits is 27648, while the sum is 35.

The square root of 491322842 is about 22165.8034368258. The cubic root of 491322842 is about 789.0823302642.

The spelling of 491322842 in words is "four hundred ninety-one million, three hundred twenty-two thousand, eight hundred forty-two".