457021643 has 8 divisors (see below), whose sum is σ = 509149200. Its totient is φ = 407318688.

The previous prime is 457021639. The next prime is 457021657. The reversal of 457021643 is 346120754.

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

It is not a de Polignac number, because 457021643 - 2² = 457021639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (457021603) 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 7 ways as a sum of consecutive naturals, for example, 605753 + ... + 606506.

It is an arithmetic number, because the mean of its divisors is an integer number (63643650).

Almost surely, 2^457021643 is an apocalyptic number.

457021643 is a deficient number, since it is larger than the sum of its proper divisors (52127557).

457021643 is a wasteful number, since it uses less digits than its factorization.

457021643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212301.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 457021643 is about 21378.0645288576. The cubic root of 457021643 is about 770.2746212214.

The spelling of 457021643 in words is "four hundred fifty-seven million, twenty-one thousand, six hundred forty-three".