2256913 has 2 divisors, whose sum is σ = 2256914. Its totient is φ = 2256912.

The previous prime is 2256911. The next prime is 2256923. The reversal of 2256913 is 3196522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1993744 + 263169 = 1412^2 + 513^2 .

It is a cyclic number.

It is not a de Polignac number, because 2256913 - 2¹ = 2256911 is a prime.

Together with 2256911, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2256911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1128456 + 1128457.

It is an arithmetic number, because the mean of its divisors is an integer number (1128457).

2^2256913 is an apocalyptic number.

It is an amenable number.

2256913 is a deficient number, since it is larger than the sum of its proper divisors (1).

2256913 is an equidigital number, since it uses as much as digits as its factorization.

2256913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 28.

The square root of 2256913 is about 1502.3025660632. The cubic root of 2256913 is about 131.1711338748.

The spelling of 2256913 in words is "two million, two hundred fifty-six thousand, nine hundred thirteen".