499815 has 24 divisors (see below), whose sum is σ = 898560. Its totient is φ = 256704.

The previous prime is 499801. The next prime is 499819. The reversal of 499815 is 518994.

It is not a de Polignac number, because 499815 - 2⁷ = 499687 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

499815 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 499815.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (499819) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1114 + ... + 1496.

It is an arithmetic number, because the mean of its divisors is an integer number (37440).

2⁴⁹⁹⁸¹⁵ is an apocalyptic number.

499815 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

499815 is a deficient number, since it is larger than the sum of its proper divisors (398745).

499815 is a wasteful number, since it uses less digits than its factorization.

499815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423 (or 420 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 499815 is about 706.9759543294. The cubic root of 499815 is about 79.3602624177.

The spelling of 499815 in words is "four hundred ninety-nine thousand, eight hundred fifteen".