457720245 has 24 divisors (see below), whose sum is σ = 795941016. Its totient is φ = 243330048.

The previous prime is 457720199. The next prime is 457720259. The reversal of 457720245 is 542027754.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 9381969 + 448338276 = 3063^2 + 21174^2 .

It is not a de Polignac number, because 457720245 - 2⁶ = 457720181 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2164 + ... + 30333.

It is an arithmetic number, because the mean of its divisors is an integer number (33164209).

Almost surely, 2^457720245 is an apocalyptic number.

457720245 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

457720245 is a deficient number, since it is larger than the sum of its proper divisors (338220771).

457720245 is a wasteful number, since it uses less digits than its factorization.

457720245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32821 (or 32818 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 36.

The square root of 457720245 is about 21394.3975143027. The cubic root of 457720245 is about 770.6669012841. Note that the first 3 decimals are identical.

Adding to 457720245 its reverse (542027754), we get a palindrome (999747999).

The spelling of 457720245 in words is "four hundred fifty-seven million, seven hundred twenty thousand, two hundred forty-five".