515897 has 4 divisors (see below), whose sum is σ = 520740. Its totient is φ = 511056.

The previous prime is 515887. The next prime is 515917. The reversal of 515897 is 798515.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 219961 + 295936 = 469^2 + 544^2 .

It is a cyclic number.

It is not a de Polignac number, because 515897 - 2¹⁰ = 514873 is a prime.

It is a super-2 number, since 2×515897² = 532299429218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (515857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2258 + ... + 2475.

It is an arithmetic number, because the mean of its divisors is an integer number (130185).

2⁵¹⁵⁸⁹⁷ is an apocalyptic number.

It is an amenable number.

515897 is a deficient number, since it is larger than the sum of its proper divisors (4843).

515897 is a wasteful number, since it uses less digits than its factorization.

515897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4842.

The product of its digits is 12600, while the sum is 35.

The square root of 515897 is about 718.2597023361. The cubic root of 515897 is about 80.2024559626.

The spelling of 515897 in words is "five hundred fifteen thousand, eight hundred ninety-seven".