450617021 has 4 divisors (see below), whose sum is σ = 450858972. Its totient is φ = 450375072.

The previous prime is 450616987. The next prime is 450617029. The reversal of 450617021 is 120716054.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 323604121 + 127012900 = 17989^2 + 11270^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-450617021 is a prime.

It is a super-2 number, since 2×450617021² = 406111399229828882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (450617029) 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, 118160 + ... + 121913.

It is an arithmetic number, because the mean of its divisors is an integer number (112714743).

Almost surely, 2^450617021 is an apocalyptic number.

It is an amenable number.

450617021 is a deficient number, since it is larger than the sum of its proper divisors (241951).

450617021 is a wasteful number, since it uses less digits than its factorization.

450617021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241950.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 450617021 is about 21227.7417781544. The cubic root of 450617021 is about 766.6595161484.

The spelling of 450617021 in words is "four hundred fifty million, six hundred seventeen thousand, twenty-one".