1013815 has 8 divisors (see below), whose sum is σ = 1327248. Its totient is φ = 737280.

The previous prime is 1013813. The next prime is 1013819. The reversal of 1013815 is 5183101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1013815 - 2¹ = 1013813 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1013792 and 1013801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1013813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9162 + ... + 9271.

It is an arithmetic number, because the mean of its divisors is an integer number (165906).

2^1013815 is an apocalyptic number.

1013815 is a deficient number, since it is larger than the sum of its proper divisors (313433).

1013815 is a wasteful number, since it uses less digits than its factorization.

1013815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18449.

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

The square root of 1013815 is about 1006.8838066033. The cubic root of 1013815 is about 100.4583955247.

Adding to 1013815 its reverse (5183101), we get a palindrome (6196916).

It can be divided in two parts, 10138 and 15, that added together give a triangular number (10153 = T₁₄₂).

The spelling of 1013815 in words is "one million, thirteen thousand, eight hundred fifteen".