491002 has 4 divisors (see below), whose sum is σ = 736506. Its totient is φ = 245500.

The previous prime is 490993. The next prime is 491003. The reversal of 491002 is 200194.

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., 488601 + 2401 = 699^2 + 49^2 .

It is not an unprimeable number, because it can be changed into a prime (491003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122749 + ... + 122752.

2⁴⁹¹⁰⁰² is an apocalyptic number.

491002 is a deficient number, since it is larger than the sum of its proper divisors (245504).

491002 is a wasteful number, since it uses less digits than its factorization.

491002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245503.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 491002 is about 700.7153487687. The cubic root of 491002 is about 78.8910531561.

Adding to 491002 its reverse (200194), we get a palindrome (691196).

The spelling of 491002 in words is "four hundred ninety-one thousand, two".