1826661 has 4 divisors (see below), whose sum is σ = 2435552. Its totient is φ = 1217772.

The previous prime is 1826659. The next prime is 1826687. The reversal of 1826661 is 1666281.

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 not a de Polignac number, because 1826661 - 2¹ = 1826659 is a prime.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1826611) 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, 304441 + ... + 304446.

It is an arithmetic number, because the mean of its divisors is an integer number (608888).

2^1826661 is an apocalyptic number.

It is an amenable number.

1826661 is a deficient number, since it is larger than the sum of its proper divisors (608891).

1826661 is an equidigital number, since it uses as much as digits as its factorization.

1826661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608890.

The product of its digits is 3456, while the sum is 30.

The square root of 1826661 is about 1351.5402324755. The cubic root of 1826661 is about 122.2416825151.

The spelling of 1826661 in words is "one million, eight hundred twenty-six thousand, six hundred sixty-one".