2523421 has 4 divisors (see below), whose sum is σ = 2561152. Its totient is φ = 2485692.

The previous prime is 2523419. The next prime is 2523457. The reversal of 2523421 is 1243252.

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 2523421 - 2¹ = 2523419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2523401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18765 + ... + 18898.

It is an arithmetic number, because the mean of its divisors is an integer number (640288).

2^2523421 is an apocalyptic number.

It is an amenable number.

2523421 is a deficient number, since it is larger than the sum of its proper divisors (37731).

2523421 is an equidigital number, since it uses as much as digits as its factorization.

2523421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37730.

The product of its digits is 480, while the sum is 19.

The square root of 2523421 is about 1588.5279349133. The cubic root of 2523421 is about 136.1433933085.

Adding to 2523421 its reverse (1243252), we get a palindrome (3766673).

The spelling of 2523421 in words is "two million, five hundred twenty-three thousand, four hundred twenty-one".