457421 has 2 divisors, whose sum is σ = 457422. Its totient is φ = 457420.

The previous prime is 457411. The next prime is 457433. The reversal of 457421 is 124754.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 373321 + 84100 = 611^2 + 290^2 .

It is a cyclic number.

It is not a de Polignac number, because 457421 - 2¹⁸ = 195277 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (457411) by changing a digit.

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 as a sum of consecutive naturals, namely, 228710 + 228711.

It is an arithmetic number, because the mean of its divisors is an integer number (228711).

2⁴⁵⁷⁴²¹ is an apocalyptic number.

It is an amenable number.

457421 is a deficient number, since it is larger than the sum of its proper divisors (1).

457421 is an equidigital number, since it uses as much as digits as its factorization.

457421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1120, while the sum is 23.

The square root of 457421 is about 676.3290619218. The cubic root of 457421 is about 77.0498917678.

It can be divided in two parts, 457 and 421, that added together give a palindrome (878).

The spelling of 457421 in words is "four hundred fifty-seven thousand, four hundred twenty-one".