2421256 has 16 divisors (see below), whose sum is σ = 4737600. Its totient is φ = 1157904.

The previous prime is 2421253. The next prime is 2421277. The reversal of 2421256 is 6521242.

2421256 = T₁₂₆₉ + T₁₂₇₀ + T₁₂₇₁.

It is not an unprimeable number, because it can be changed into a prime (2421253) 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, 6396 + ... + 6763.

It is an arithmetic number, because the mean of its divisors is an integer number (296100).

2^2421256 is an apocalyptic number.

2421256 is the 1271-st centered triangular number.

It is an amenable number.

2421256 is a deficient number, since it is larger than the sum of its proper divisors (2316344).

2421256 is a wasteful number, since it uses less digits than its factorization.

2421256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13188 (or 13184 counting only the distinct ones).

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

The square root of 2421256 is about 1556.0385599335. The cubic root of 2421256 is about 134.2806917865.

Adding to 2421256 its reverse (6521242), we get a palindrome (8942498).

The spelling of 2421256 in words is "two million, four hundred twenty-one thousand, two hundred fifty-six".