494071221 has 24 divisors (see below), whose sum is σ = 799771840. Its totient is φ = 265715712.

The previous prime is 494071217. The next prime is 494071223. The reversal of 494071221 is 122170494.

It is not a de Polignac number, because 494071221 - 2² = 494071217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (494071223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34636 + ... + 46773.

Almost surely, 2^494071221 is an apocalyptic number.

It is an amenable number.

494071221 is a deficient number, since it is larger than the sum of its proper divisors (305700619).

494071221 is a wasteful number, since it uses less digits than its factorization.

494071221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81453 (or 81436 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 494071221 is about 22227.7129052901. The cubic root of 494071221 is about 790.5509274624.

The spelling of 494071221 in words is "four hundred ninety-four million, seventy-one thousand, two hundred twenty-one".