1399611 has 4 divisors (see below), whose sum is σ = 1866152. Its totient is φ = 933072.

The previous prime is 1399609. The next prime is 1399621. The reversal of 1399611 is 1169931.

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

It is not a de Polignac number, because 1399611 - 2¹ = 1399609 is a prime.

It is a D-number.

It is a Duffinian number.

1399611 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1399621) 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 3 ways as a sum of consecutive naturals, for example, 233266 + ... + 233271.

It is an arithmetic number, because the mean of its divisors is an integer number (466538).

2^1399611 is an apocalyptic number.

1399611 is a deficient number, since it is larger than the sum of its proper divisors (466541).

1399611 is an equidigital number, since it uses as much as digits as its factorization.

1399611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466540.

The product of its digits is 1458, while the sum is 30.

The square root of 1399611 is about 1183.0515626971. The cubic root of 1399611 is about 111.8585320579.

The spelling of 1399611 in words is "one million, three hundred ninety-nine thousand, six hundred eleven".