2501021 has 4 divisors (see below), whose sum is σ = 2508000. Its totient is φ = 2494044.

The previous prime is 2501003. The next prime is 2501071. The reversal of 2501021 is 1201052.

2501021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is not a de Polignac number, because 2501021 - 2⁶ = 2500957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2500993 and 2501011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2501071) 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 3 ways as a sum of consecutive naturals, for example, 2921 + ... + 3678.

It is an arithmetic number, because the mean of its divisors is an integer number (627000).

2^2501021 is an apocalyptic number.

It is an amenable number.

2501021 is a deficient number, since it is larger than the sum of its proper divisors (6979).

2501021 is an equidigital number, since it uses as much as digits as its factorization.

2501021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6978.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 2501021 is about 1581.4616656751. The cubic root of 2501021 is about 135.7393544510.

Adding to 2501021 its reverse (1201052), we get a palindrome (3702073).

The spelling of 2501021 in words is "two million, five hundred one thousand, twenty-one".