450207561 has 4 divisors (see below), whose sum is σ = 600276752. Its totient is φ = 300138372.

The previous prime is 450207559. The next prime is 450207577. The reversal of 450207561 is 165702054.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 450207561 - 2¹ = 450207559 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (450207551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75034591 + ... + 75034596.

It is an arithmetic number, because the mean of its divisors is an integer number (150069188).

Almost surely, 2^450207561 is an apocalyptic number.

It is an amenable number.

450207561 is a deficient number, since it is larger than the sum of its proper divisors (150069191).

450207561 is a wasteful number, since it uses less digits than its factorization.

450207561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150069190.

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 450207561 is about 21218.0951312789. The cubic root of 450207561 is about 766.4272335074.

The spelling of 450207561 in words is "four hundred fifty million, two hundred seven thousand, five hundred sixty-one".