201826 has 4 divisors (see below), whose sum is σ = 302742. Its totient is φ = 100912.

The previous prime is 201823. The next prime is 201827. The reversal of 201826 is 628102.

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 only one way, i.e., 201601 + 225 = 449^2 + 15^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50455 + ... + 50458.

2²⁰¹⁸²⁶ is an apocalyptic number.

201826 is a deficient number, since it is larger than the sum of its proper divisors (100916).

201826 is a wasteful number, since it uses less digits than its factorization.

201826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100915.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 201826 is about 449.2504869224. The cubic root of 201826 is about 58.6577910701.

Adding to 201826 its reverse (628102), we get a palindrome (829928).

The spelling of 201826 in words is "two hundred one thousand, eight hundred twenty-six".