797121 has 20 divisors (see below), whose sum is σ = 1284052. Its totient is φ = 489888.

The previous prime is 797119. The next prime is 797131. The reversal of 797121 is 121797.

It can be written as a sum of positive squares in 2 ways, for example, as 291600 + 505521 = 540^2 + 711^2 .

It is not a de Polignac number, because 797121 - 2¹ = 797119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

797121 is a lucky number.

It is a nialpdrome in base 3.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (797131) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 675 + ... + 1431.

2⁷⁹⁷¹²¹ is an apocalyptic number.

It is an amenable number.

797121 is a deficient number, since it is larger than the sum of its proper divisors (486931).

797121 is a wasteful number, since it uses less digits than its factorization.

797121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782 (or 773 counting only the distinct ones).

The product of its digits is 882, while the sum is 27.

The square root of 797121 is about 892.8163304958. The cubic root of 797121 is about 92.7202833675.

The spelling of 797121 in words is "seven hundred ninety-seven thousand, one hundred twenty-one".