2521426 has 4 divisors (see below), whose sum is σ = 3782142. Its totient is φ = 1260712.

The previous prime is 2521417. The next prime is 2521429. The reversal of 2521426 is 6241252.

2521426 is nontrivially palindromic in base 9.

2521426 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.

It can be written as a sum of positive squares in only one way, i.e., 2105401 + 416025 = 1451^2 + 645^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 2521397 and 2521406.

It is not an unprimeable number, because it can be changed into a prime (2521429) 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 as a sum of consecutive naturals, namely, 630355 + ... + 630358.

2^2521426 is an apocalyptic number.

2521426 is a deficient number, since it is larger than the sum of its proper divisors (1260716).

2521426 is a wasteful number, since it uses less digits than its factorization.

2521426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1260715.

The product of its digits is 960, while the sum is 22.

The square root of 2521426 is about 1587.8998708987. The cubic root of 2521426 is about 136.1075058264.

Adding to 2521426 its reverse (6241252), we get a palindrome (8762678).

The spelling of 2521426 in words is "two million, five hundred twenty-one thousand, four hundred twenty-six".