251449241 has 2 divisors, whose sum is σ = 251449242. Its totient is φ = 251449240.

The previous prime is 251449217. The next prime is 251449267. The reversal of 251449241 is 142944152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 240126016 + 11323225 = 15496^2 + 3365^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251449241 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 251449198 and 251449207.

It is not a weakly prime, because it can be changed into another prime (251449291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125724620 + 125724621.

It is an arithmetic number, because the mean of its divisors is an integer number (125724621).

Almost surely, 2^251449241 is an apocalyptic number.

It is an amenable number.

251449241 is a deficient number, since it is larger than the sum of its proper divisors (1).

251449241 is an equidigital number, since it uses as much as digits as its factorization.

251449241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 32.

The square root of 251449241 is about 15857.1510997405. The cubic root of 251449241 is about 631.1754664671.

The spelling of 251449241 in words is "two hundred fifty-one million, four hundred forty-nine thousand, two hundred forty-one".