494722281 has 16 divisors (see below), whose sum is σ = 683213760. Its totient is φ = 318050880.

The previous prime is 494722259. The next prime is 494722297. The reversal of 494722281 is 182227494.

It is a happy number.

It is not a de Polignac number, because 494722281 - 2²⁵ = 461167849 is a prime.

It is a super-2 number, since 2×494722281² = 489500270635685922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (494722201) 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 15 ways as a sum of consecutive naturals, for example, 78846 + ... + 84888.

It is an arithmetic number, because the mean of its divisors is an integer number (42700860).

Almost surely, 2^494722281 is an apocalyptic number.

It is an amenable number.

494722281 is a deficient number, since it is larger than the sum of its proper divisors (188491479).

494722281 is a wasteful number, since it uses less digits than its factorization.

494722281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7016.

The product of its digits is 64512, while the sum is 39.

The square root of 494722281 is about 22242.3533152407. The cubic root of 494722281 is about 790.8980232864.

The spelling of 494722281 in words is "four hundred ninety-four million, seven hundred twenty-two thousand, two hundred eighty-one".