1826681 has 4 divisors (see below), whose sum is σ = 1889700. Its totient is φ = 1763664.

The previous prime is 1826659. The next prime is 1826687. The reversal of 1826681 is 1866281.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 434281 + 1392400 = 659^2 + 1180^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1826681 is a prime.

It is a super-2 number, since 2×1826681² = 6673526951522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1826687) 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, 31466 + ... + 31523.

It is an arithmetic number, because the mean of its divisors is an integer number (472425).

2^1826681 is an apocalyptic number.

It is an amenable number.

1826681 is a deficient number, since it is larger than the sum of its proper divisors (63019).

1826681 is an equidigital number, since it uses as much as digits as its factorization.

1826681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63018.

The product of its digits is 4608, while the sum is 32.

The square root of 1826681 is about 1351.5476314211. The cubic root of 1826681 is about 122.2421286524.

The spelling of 1826681 in words is "one million, eight hundred twenty-six thousand, six hundred eighty-one".