2101826 has 4 divisors (see below), whose sum is σ = 3152742. Its totient is φ = 1050912.

The previous prime is 2101823. The next prime is 2101843. The reversal of 2101826 is 6281012.

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., 1437601 + 664225 = 1199^2 + 815^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2101798 and 2101807.

It is not an unprimeable number, because it can be changed into a prime (2101823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 525455 + ... + 525458.

2^2101826 is an apocalyptic number.

2101826 is a deficient number, since it is larger than the sum of its proper divisors (1050916).

2101826 is a wasteful number, since it uses less digits than its factorization.

2101826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050915.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 2101826 is about 1449.7675675776. The cubic root of 2101826 is about 128.0950222152.

Adding to 2101826 its reverse (6281012), we get a palindrome (8382838).

The spelling of 2101826 in words is "two million, one hundred one thousand, eight hundred twenty-six".