2841981 has 4 divisors (see below), whose sum is σ = 3789312. Its totient is φ = 1894652.

The previous prime is 2841973. The next prime is 2841989. The reversal of 2841981 is 1891482.

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 an interprime number because it is at equal distance from previous prime (2841973) and next prime (2841989).

It is a cyclic number.

It is not a de Polignac number, because 2841981 - 2³ = 2841973 is a prime.

It is a super-2 number, since 2×2841981² = 16153712008722, which contains 22 as substring.

It is a D-number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2841989) 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, 473661 + ... + 473666.

It is an arithmetic number, because the mean of its divisors is an integer number (947328).

2^2841981 is an apocalyptic number.

It is an amenable number.

2841981 is a deficient number, since it is larger than the sum of its proper divisors (947331).

2841981 is an equidigital number, since it uses as much as digits as its factorization.

2841981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947330.

The product of its digits is 4608, while the sum is 33.

The square root of 2841981 is about 1685.8176057925. The cubic root of 2841981 is about 141.6468942801.

The spelling of 2841981 in words is "two million, eight hundred forty-one thousand, nine hundred eighty-one".