450253721 has 8 divisors (see below), whose sum is σ = 484820640. Its totient is φ = 416584768.

The previous prime is 450253693. The next prime is 450253729. The reversal of 450253721 is 127352054.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 450253721 - 2²⁶ = 383144857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (450253729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223451 + ... + 225456.

It is an arithmetic number, because the mean of its divisors is an integer number (60602580).

Almost surely, 2^450253721 is an apocalyptic number.

It is an amenable number.

450253721 is a deficient number, since it is larger than the sum of its proper divisors (34566919).

450253721 is a wasteful number, since it uses less digits than its factorization.

450253721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448983.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 450253721 is about 21219.1828542006. The cubic root of 450253721 is about 766.4534266644.

The spelling of 450253721 in words is "four hundred fifty million, two hundred fifty-three thousand, seven hundred twenty-one".