1826021 has 8 divisors (see below), whose sum is σ = 1945944. Its totient is φ = 1707520.

The previous prime is 1826003. The next prime is 1826023. The reversal of 1826021 is 1206281.

It can be written as a sum of positive squares in 4 ways, for example, as 148996 + 1677025 = 386^2 + 1295^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1826021 - 2¹⁰ = 1824997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1825984 and 1826002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1826023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3731 + ... + 4191.

It is an arithmetic number, because the mean of its divisors is an integer number (243243).

2^1826021 is an apocalyptic number.

It is an amenable number.

1826021 is a deficient number, since it is larger than the sum of its proper divisors (119923).

1826021 is a wasteful number, since it uses less digits than its factorization.

1826021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711.

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

The square root of 1826021 is about 1351.3034448265. The cubic root of 1826021 is about 122.2274044023.

It can be divided in two parts, 18260 and 21, that added together give a palindrome (18281).

The spelling of 1826021 in words is "one million, eight hundred twenty-six thousand, twenty-one".