1399811 has 8 divisors (see below), whose sum is σ = 1607424. Its totient is φ = 1194120.

The previous prime is 1399793. The next prime is 1399813. The reversal of 1399811 is 1189931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1399811 - 2¹⁸ = 1137667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1399813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1856 + ... + 2498.

It is an arithmetic number, because the mean of its divisors is an integer number (200928).

2^1399811 is an apocalyptic number.

1399811 is a deficient number, since it is larger than the sum of its proper divisors (207613).

1399811 is an equidigital number, since it uses as much as digits as its factorization.

1399811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961.

The product of its digits is 1944, while the sum is 32.

The square root of 1399811 is about 1183.1360868472. The cubic root of 1399811 is about 111.8638598813.

The spelling of 1399811 in words is "one million, three hundred ninety-nine thousand, eight hundred eleven".