1299015 has 12 divisors (see below), whose sum is σ = 2251704. Its totient is φ = 692784.

The previous prime is 1299013. The next prime is 1299019. The reversal of 1299015 is 5109921.

It is a happy number.

It is not a de Polignac number, because 1299015 - 2¹ = 1299013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1299015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14389 + ... + 14478.

It is an arithmetic number, because the mean of its divisors is an integer number (187642).

2^1299015 is an apocalyptic number.

1299015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1299015 is a deficient number, since it is larger than the sum of its proper divisors (952689).

1299015 is a wasteful number, since it uses less digits than its factorization.

1299015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28878 (or 28875 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 27.

The square root of 1299015 is about 1139.7433921721. The cubic root of 1299015 is about 109.1117166749. Note that the first 3 decimals are identical.

The spelling of 1299015 in words is "one million, two hundred ninety-nine thousand, fifteen".