498721 has 4 divisors (see below), whose sum is σ = 500500. Its totient is φ = 496944.

The previous prime is 498691. The next prime is 498733. The reversal of 498721 is 127894.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 180625 + 318096 = 425^2 + 564^2 .

It is a cyclic number.

It is not a de Polignac number, because 498721 - 2⁵ = 498689 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (498761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 366 + ... + 1063.

It is an arithmetic number, because the mean of its divisors is an integer number (125125).

2⁴⁹⁸⁷²¹ is an apocalyptic number.

It is an amenable number.

498721 is a deficient number, since it is larger than the sum of its proper divisors (1779).

498721 is a wasteful number, since it uses less digits than its factorization.

498721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1778.

The product of its digits is 4032, while the sum is 31.

The square root of 498721 is about 706.2018125154. The cubic root of 498721 is about 79.3023186128.

The spelling of 498721 in words is "four hundred ninety-eight thousand, seven hundred twenty-one".