2521243 has 4 divisors (see below), whose sum is σ = 2653960. Its totient is φ = 2388528.

The previous prime is 2521223. The next prime is 2521249. The reversal of 2521243 is 3421252.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2521243 - 2¹³ = 2513051 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 132697 = 2521243 / (2 + 5 + 2 + 1 + 2 + 4 + 3).

It is a Duffinian number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 2521243.

It is not an unprimeable number, because it can be changed into a prime (2521249) 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, 66330 + ... + 66367.

It is an arithmetic number, because the mean of its divisors is an integer number (663490).

2^2521243 is an apocalyptic number.

2521243 is a deficient number, since it is larger than the sum of its proper divisors (132717).

2521243 is a wasteful number, since it uses less digits than its factorization.

2521243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132716.

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

The square root of 2521243 is about 1587.8422465724. The cubic root of 2521243 is about 136.1042129442.

Adding to 2521243 its reverse (3421252), we get a palindrome (5942495).

Subtracting 2521243 from its reverse (3421252), we obtain a palindrome (900009).

It can be divided in two parts, 252 and 1243, that multiplied together give a triangular number (313236 = T₇₉₁).

The spelling of 2521243 in words is "two million, five hundred twenty-one thousand, two hundred forty-three".