857513 has 2 divisors, whose sum is σ = 857514. Its totient is φ = 857512.

The previous prime is 857471. The next prime is 857539. The reversal of 857513 is 315758.

857513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 619369 + 238144 = 787^2 + 488^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-857513 is a prime.

It is not a weakly prime, because it can be changed into another prime (857573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428756 + 428757.

It is an arithmetic number, because the mean of its divisors is an integer number (428757).

2⁸⁵⁷⁵¹³ is an apocalyptic number.

It is an amenable number.

857513 is a deficient number, since it is larger than the sum of its proper divisors (1).

857513 is an equidigital number, since it uses as much as digits as its factorization.

857513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4200, while the sum is 29.

The square root of 857513 is about 926.0199781862. The cubic root of 857513 is about 95.0050966795.

The spelling of 857513 in words is "eight hundred fifty-seven thousand, five hundred thirteen".