826605 has 40 divisors (see below), whose sum is σ = 1605912. Its totient is φ = 404352.

The previous prime is 826603. The next prime is 826607. The reversal of 826605 is 506628.

It is an interprime number because it is at equal distance from previous prime (826603) and next prime (826607).

It can be written as a sum of positive squares in 4 ways, for example, as 324 + 826281 = 18^2 + 909^2 .

It is not a de Polignac number, because 826605 - 2¹ = 826603 is a prime.

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

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 (826603) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5187 + ... + 5343.

2⁸²⁶⁶⁰⁵ is an apocalyptic number.

It is an amenable number.

826605 is a deficient number, since it is larger than the sum of its proper divisors (779307).

826605 is a wasteful number, since it uses less digits than its factorization.

826605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187 (or 178 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 826605 is about 909.1782003546. The cubic root of 826605 is about 93.8496540326.

It can be divided in two parts, 826 and 605, that added together give a triangular number (1431 = T₅₃).

The spelling of 826605 in words is "eight hundred twenty-six thousand, six hundred five".