2021572 has 48 divisors (see below), whose sum is σ = 4451328. Its totient is φ = 783360.

The previous prime is 2021567. The next prime is 2021573. The reversal of 2021572 is 2751202.

It is not an unprimeable number, because it can be changed into a prime (2021573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14688 + ... + 14824.

It is an arithmetic number, because the mean of its divisors is an integer number (92736).

2^2021572 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2021572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2225664).

2021572 is an abundant number, since it is smaller than the sum of its proper divisors (2429756).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2021572 is a wasteful number, since it uses less digits than its factorization.

2021572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196 (or 194 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 2021572 is about 1421.8199604732. The cubic root of 2021572 is about 126.4434696667.

Adding to 2021572 its reverse (2751202), we get a palindrome (4772774).

The spelling of 2021572 in words is "two million, twenty-one thousand, five hundred seventy-two".