2021741 has 4 divisors (see below), whose sum is σ = 2030652. Its totient is φ = 2012832.

The previous prime is 2021737. The next prime is 2021743. The reversal of 2021741 is 1471202.

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 469225 + 1552516 = 685^2 + 1246^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021741 - 2² = 2021737 is a prime.

It is a Duffinian 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 (2021743) 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, 4106 + ... + 4571.

It is an arithmetic number, because the mean of its divisors is an integer number (507663).

2^2021741 is an apocalyptic number.

It is an amenable number.

2021741 is a deficient number, since it is larger than the sum of its proper divisors (8911).

2021741 is an equidigital number, since it uses as much as digits as its factorization.

2021741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8910.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 2021741 is about 1421.8793901031. The cubic root of 2021741 is about 126.4469930552.

Adding to 2021741 its reverse (1471202), we get a palindrome (3492943).

The spelling of 2021741 in words is "two million, twenty-one thousand, seven hundred forty-one".