1399055 has 16 divisors (see below), whose sum is σ = 1949184. Its totient is φ = 944160.

The previous prime is 1399039. The next prime is 1399063. The reversal of 1399055 is 5509931.

It is not a de Polignac number, because 1399055 - 2⁴ = 1399039 is a prime.

It is a Duffinian number.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 2204 + ... + 2766.

It is an arithmetic number, because the mean of its divisors is an integer number (121824).

2^1399055 is an apocalyptic number.

1399055 is a deficient number, since it is larger than the sum of its proper divisors (550129).

1399055 is an equidigital number, since it uses as much as digits as its factorization.

1399055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646.

The product of its (nonzero) digits is 6075, while the sum is 32.

The square root of 1399055 is about 1182.8165538240. The cubic root of 1399055 is about 111.8437180415.

The spelling of 1399055 in words is "one million, three hundred ninety-nine thousand, fifty-five".