450236261 has 2 divisors, whose sum is σ = 450236262. Its totient is φ = 450236260.

The previous prime is 450236251. The next prime is 450236263. The reversal of 450236261 is 162632054.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 449185636 + 1050625 = 21194^2 + 1025^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-450236261 is a prime.

It is a Sophie Germain prime.

Together with 450236263, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (450236263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225118130 + 225118131.

It is an arithmetic number, because the mean of its divisors is an integer number (225118131).

Almost surely, 2^450236261 is an apocalyptic number.

It is an amenable number.

450236261 is a deficient number, since it is larger than the sum of its proper divisors (1).

450236261 is an equidigital number, since it uses as much as digits as its factorization.

450236261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 450236261 is about 21218.7714300334. The cubic root of 450236261 is about 766.4435193247.

The spelling of 450236261 in words is "four hundred fifty million, two hundred thirty-six thousand, two hundred sixty-one".