457021517 has 2 divisors, whose sum is σ = 457021518. Its totient is φ = 457021516.

The previous prime is 457021507. The next prime is 457021531. The reversal of 457021517 is 715120754.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 401160841 + 55860676 = 20029^2 + 7474^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-457021517 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (457021507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 228510758 + 228510759.

It is an arithmetic number, because the mean of its divisors is an integer number (228510759).

Almost surely, 2^457021517 is an apocalyptic number.

It is an amenable number.

457021517 is a deficient number, since it is larger than the sum of its proper divisors (1).

457021517 is an equidigital number, since it uses as much as digits as its factorization.

457021517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9800, while the sum is 32.

The square root of 457021517 is about 21378.0615819115. The cubic root of 457021517 is about 770.2745504336.

The spelling of 457021517 in words is "four hundred fifty-seven million, twenty-one thousand, five hundred seventeen".