823245 has 16 divisors (see below), whose sum is σ = 1337472. Its totient is φ = 432320.

The previous prime is 823243. The next prime is 823261. The reversal of 823245 is 542328.

It is not a de Polignac number, because 823245 - 2¹ = 823243 is a prime.

It is a super-4 number, since 4×823245⁴ (a number of 25 digits) contains 4444 as substring.

823245 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 679 + ... + 1451.

It is an arithmetic number, because the mean of its divisors is an integer number (83592).

2⁸²³²⁴⁵ is an apocalyptic number.

It is an amenable number.

823245 is a deficient number, since it is larger than the sum of its proper divisors (514227).

823245 is a wasteful number, since it uses less digits than its factorization.

823245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852.

The product of its digits is 1920, while the sum is 24.

The square root of 823245 is about 907.3284961909. The cubic root of 823245 is about 93.7223207175.

The spelling of 823245 in words is "eight hundred twenty-three thousand, two hundred forty-five".