813115 has 4 divisors (see below), whose sum is σ = 975744. Its totient is φ = 650488.

The previous prime is 813107. The next prime is 813121. The reversal of 813115 is 511318.

813115 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 511318 = 2 ⋅255659.

It is a cyclic number.

It is not a de Polignac number, because 813115 - 2³ = 813107 is a prime.

It is a super-2 number, since 2×813115² = 1322312006450, which contains 22 as substring.

It is a Duffinian number.

813115 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 813092 and 813101.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81307 + ... + 81316.

It is an arithmetic number, because the mean of its divisors is an integer number (243936).

2⁸¹³¹¹⁵ is an apocalyptic number.

813115 is a deficient number, since it is larger than the sum of its proper divisors (162629).

813115 is a wasteful number, since it uses less digits than its factorization.

813115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162628.

The product of its digits is 120, while the sum is 19.

The square root of 813115 is about 901.7288949568. The cubic root of 813115 is about 93.3363165146.

The spelling of 813115 in words is "eight hundred thirteen thousand, one hundred fifteen".