2445021 has 12 divisors (see below), whose sum is σ = 3546972. Its totient is φ = 1622976.

The previous prime is 2445011. The next prime is 2445029. The reversal of 2445021 is 1205442.

It can be written as a sum of positive squares in 2 ways, for example, as 1179396 + 1265625 = 1086^2 + 1125^2 .

It is not a de Polignac number, because 2445021 - 2¹⁰ = 2443997 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2444985 and 2445003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2445029) 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 11 ways as a sum of consecutive naturals, for example, 2425 + ... + 3281.

It is an arithmetic number, because the mean of its divisors is an integer number (295581).

2^2445021 is an apocalyptic number.

It is an amenable number.

2445021 is a deficient number, since it is larger than the sum of its proper divisors (1101951).

2445021 is a wasteful number, since it uses less digits than its factorization.

2445021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1180 (or 1177 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 2445021 is about 1563.6562921563. The cubic root of 2445021 is about 134.7185907611.

The spelling of 2445021 in words is "two million, four hundred forty-five thousand, twenty-one".