491402 has 16 divisors (see below), whose sum is σ = 793800. Its totient is φ = 227328.

The previous prime is 491377. The next prime is 491417. The reversal of 491402 is 204194.

It is a Cunningham number, because it is equal to 701²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 383161 + 108241 = 619^2 + 329^2 .

It is an unprimeable number.

491402 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3224 + ... + 3372.

2⁴⁹¹⁴⁰² is an apocalyptic number.

491402 is a deficient number, since it is larger than the sum of its proper divisors (302398).

491402 is a wasteful number, since it uses less digits than its factorization.

491402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 491402 is about 701.0007132664. Note that the first 3 decimals coincide. The cubic root of 491402 is about 78.9124704863.

Adding to 491402 its reverse (204194), we get a palindrome (695596).

The spelling of 491402 in words is "four hundred ninety-one thousand, four hundred two".