2562021 has 24 divisors (see below), whose sum is σ = 4615104. Its totient is φ = 1330560.

The previous prime is 2562011. The next prime is 2562023. The reversal of 2562021 is 1202652.

2562021 is a `hidden beast` number, since 25 + 620 + 21 = 666.

It is not a de Polignac number, because 2562021 - 2¹⁰ = 2560997 is a prime.

It is a Curzon number.

2562021 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2561985 and 2562003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2562023) 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 23 ways as a sum of consecutive naturals, for example, 1156 + ... + 2541.

It is an arithmetic number, because the mean of its divisors is an integer number (192296).

2^2562021 is an apocalyptic number.

2562021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2562021 is a deficient number, since it is larger than the sum of its proper divisors (2053083).

2562021 is a wasteful number, since it uses less digits than its factorization.

2562021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3721 (or 3718 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 2562021 is about 1600.6314379019. The cubic root of 2562021 is about 136.8340648214.

Adding to 2562021 its reverse (1202652), we get a palindrome (3764673).

The spelling of 2562021 in words is "two million, five hundred sixty-two thousand, twenty-one".