798421 has 4 divisors (see below), whose sum is σ = 859852. Its totient is φ = 736992.

The previous prime is 798409. The next prime is 798443. The reversal of 798421 is 124897.

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 + 617796 = 425^2 + 786^2 .

It is a cyclic number.

It is not a de Polignac number, because 798421 - 2⁷ = 798293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (798451) by changing a digit.

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, 30696 + ... + 30721.

It is an arithmetic number, because the mean of its divisors is an integer number (214963).

2⁷⁹⁸⁴²¹ is an apocalyptic number.

It is an amenable number.

798421 is a deficient number, since it is larger than the sum of its proper divisors (61431).

798421 is a wasteful number, since it uses less digits than its factorization.

798421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61430.

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

The square root of 798421 is about 893.5440671842. The cubic root of 798421 is about 92.7706608724.

The spelling of 798421 in words is "seven hundred ninety-eight thousand, four hundred twenty-one".