2522421 has 40 divisors (see below), whose sum is σ = 4356000. Its totient is φ = 1438560.

The previous prime is 2522419. The next prime is 2522431. The reversal of 2522421 is 1242252.

It is not a de Polignac number, because 2522421 - 2¹ = 2522419 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 2522394 and 2522403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2522431) 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 39 ways as a sum of consecutive naturals, for example, 16855 + ... + 17003.

It is an arithmetic number, because the mean of its divisors is an integer number (108900).

2^2522421 is an apocalyptic number.

It is an amenable number.

2522421 is a deficient number, since it is larger than the sum of its proper divisors (1833579).

2522421 is a wasteful number, since it uses less digits than its factorization.

2522421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191 (or 182 counting only the distinct ones).

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

The square root of 2522421 is about 1588.2131469044. The cubic root of 2522421 is about 136.1254069610.

Adding to 2522421 its reverse (1242252), we get a palindrome (3764673).

The spelling of 2522421 in words is "two million, five hundred twenty-two thousand, four hundred twenty-one".