871513 has 2 divisors, whose sum is σ = 871514. Its totient is φ = 871512.

The previous prime is 871477. The next prime is 871517. The reversal of 871513 is 315178.

871513 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., 870489 + 1024 = 933^2 + 32^2 .

It is a cyclic number.

It is not a de Polignac number, because 871513 - 2⁹ = 871001 is a prime.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (871517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435756 + 435757.

It is an arithmetic number, because the mean of its divisors is an integer number (435757).

2⁸⁷¹⁵¹³ is an apocalyptic number.

It is an amenable number.

871513 is a deficient number, since it is larger than the sum of its proper divisors (1).

871513 is an equidigital number, since it uses as much as digits as its factorization.

871513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 840, while the sum is 25.

The square root of 871513 is about 933.5486061261. The cubic root of 871513 is about 95.5193349191.

It can be divided in two parts, 87 and 1513, that added together give a square (1600 = 40²).

The spelling of 871513 in words is "eight hundred seventy-one thousand, five hundred thirteen".