491902 has 8 divisors (see below), whose sum is σ = 753696. Its totient is φ = 240672.

The previous prime is 491899. The next prime is 491923. The reversal of 491902 is 209194.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2523 + ... + 2710.

It is an arithmetic number, because the mean of its divisors is an integer number (94212).

2⁴⁹¹⁹⁰² is an apocalyptic number.

491902 is a deficient number, since it is larger than the sum of its proper divisors (261794).

491902 is a wasteful number, since it uses less digits than its factorization.

491902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5282.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 491902 is about 701.3572556123. The cubic root of 491902 is about 78.9392258113.

The spelling of 491902 in words is "four hundred ninety-one thousand, nine hundred two".