826042181 has 4 divisors (see below), whose sum is σ = 834062112. Its totient is φ = 818022252.

The previous prime is 826042103. The next prime is 826042199. The reversal of 826042181 is 181240628.

It is a happy number.

826042181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is not a de Polignac number, because 826042181 - 2²² = 821847877 is a prime.

It is a super-2 number, since 2×826042181² = 1364691369582473522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (826042381) 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, 4009811 + ... + 4010016.

It is an arithmetic number, because the mean of its divisors is an integer number (208515528).

Almost surely, 2^826042181 is an apocalyptic number.

It is an amenable number.

826042181 is a deficient number, since it is larger than the sum of its proper divisors (8019931).

826042181 is a wasteful number, since it uses less digits than its factorization.

826042181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8019930.

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 826042181 is about 28740.9495493799. The cubic root of 826042181 is about 938.2834907190.

The spelling of 826042181 in words is "eight hundred twenty-six million, forty-two thousand, one hundred eighty-one".