1882981 has 4 divisors (see below), whose sum is σ = 1889964. Its totient is φ = 1876000.

The previous prime is 1882963. The next prime is 1882997. The reversal of 1882981 is 1892881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1892881 = 211 ⋅8971.

It can be written as a sum of positive squares in 2 ways, for example, as 1018081 + 864900 = 1009^2 + 930^2 .

It is a cyclic number.

It is not a de Polignac number, because 1882981 - 2⁹ = 1882469 is a prime.

It is a super-2 number, since 2×1882981² = 7091234892722, which contains 22 as substring.

It is a Duffinian number.

1882981 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1882981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1882921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3070 + ... + 3631.

It is an arithmetic number, because the mean of its divisors is an integer number (472491).

2^1882981 is an apocalyptic number.

It is an amenable number.

1882981 is a deficient number, since it is larger than the sum of its proper divisors (6983).

1882981 is an equidigital number, since it uses as much as digits as its factorization.

1882981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6982.

The product of its digits is 9216, while the sum is 37.

The square root of 1882981 is about 1372.2175483501. The cubic root of 1882981 is about 123.4853146279.

The spelling of 1882981 in words is "one million, eight hundred eighty-two thousand, nine hundred eighty-one".