816253 has 4 divisors (see below), whose sum is σ = 831708. Its totient is φ = 800800.

The previous prime is 816251. The next prime is 816271. The reversal of 816253 is 352618.

It is a happy number.

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 736164 + 80089 = 858^2 + 283^2 .

It is a cyclic number.

It is not a de Polignac number, because 816253 - 2¹ = 816251 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 (816251) 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, 7648 + ... + 7753.

It is an arithmetic number, because the mean of its divisors is an integer number (207927).

2⁸¹⁶²⁵³ is an apocalyptic number.

It is an amenable number.

816253 is a deficient number, since it is larger than the sum of its proper divisors (15455).

816253 is a wasteful number, since it uses less digits than its factorization.

816253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15454.

The product of its digits is 1440, while the sum is 25.

The square root of 816253 is about 903.4672102517. The cubic root of 816253 is about 93.4562312421.

It can be divided in two parts, 8 and 16253, that added together give a palindrome (16261).

The spelling of 816253 in words is "eight hundred sixteen thousand, two hundred fifty-three".