1399841 has 4 divisors (see below), whose sum is σ = 1403184. Its totient is φ = 1396500.

The previous prime is 1399837. The next prime is 1399843. The reversal of 1399841 is 1489931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1489931 = 17 ⋅87643.

It is a cyclic number.

It is not a de Polignac number, because 1399841 - 2² = 1399837 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1399843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 935 + ... + 1916.

It is an arithmetic number, because the mean of its divisors is an integer number (350796).

2^1399841 is an apocalyptic number.

It is an amenable number.

1399841 is a deficient number, since it is larger than the sum of its proper divisors (3343).

1399841 is an equidigital number, since it uses as much as digits as its factorization.

1399841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3342.

The product of its digits is 7776, while the sum is 35.

The square root of 1399841 is about 1183.1487649489. The cubic root of 1399841 is about 111.8646590111.

The spelling of 1399841 in words is "one million, three hundred ninety-nine thousand, eight hundred forty-one".