1399115 has 4 divisors (see below), whose sum is σ = 1678944. Its totient is φ = 1119288.

The previous prime is 1399109. The next prime is 1399121. The reversal of 1399115 is 5119931.

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

It is an interprime number because it is at equal distance from previous prime (1399109) and next prime (1399121).

It is a cyclic number.

It is not a de Polignac number, because 1399115 - 2¹⁰ = 1398091 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 139907 + ... + 139916.

It is an arithmetic number, because the mean of its divisors is an integer number (419736).

2^1399115 is an apocalyptic number.

1399115 is a deficient number, since it is larger than the sum of its proper divisors (279829).

1399115 is an equidigital number, since it uses as much as digits as its factorization.

1399115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279828.

The product of its digits is 1215, while the sum is 29.

The square root of 1399115 is about 1182.8419167412. The cubic root of 1399115 is about 111.8453168652.

The spelling of 1399115 in words is "one million, three hundred ninety-nine thousand, one hundred fifteen".