797421 has 4 divisors (see below), whose sum is σ = 1063232. Its totient is φ = 531612.

The previous prime is 797417. The next prime is 797429. The reversal of 797421 is 124797.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 797421 - 2² = 797417 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (797429) 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, 132901 + ... + 132906.

It is an arithmetic number, because the mean of its divisors is an integer number (265808).

2⁷⁹⁷⁴²¹ is an apocalyptic number.

It is an amenable number.

797421 is a deficient number, since it is larger than the sum of its proper divisors (265811).

797421 is a wasteful number, since it uses less digits than its factorization.

797421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265810.

The product of its digits is 3528, while the sum is 30.

The square root of 797421 is about 892.9843223708. The cubic root of 797421 is about 92.7319138043.

The spelling of 797421 in words is "seven hundred ninety-seven thousand, four hundred twenty-one".