1399241 has 4 divisors (see below), whose sum is σ = 1402500. Its totient is φ = 1395984.

The previous prime is 1399231. The next prime is 1399261. The reversal of 1399241 is 1429931.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1429931 = 263 ⋅5437.

It can be written as a sum of positive squares in 2 ways, for example, as 633616 + 765625 = 796^2 + 875^2 .

It is a cyclic number.

It is not a de Polignac number, because 1399241 - 2¹⁰ = 1398217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1399201) by changing a digit.

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, 866 + ... + 1883.

It is an arithmetic number, because the mean of its divisors is an integer number (350625).

2^1399241 is an apocalyptic number.

It is an amenable number.

1399241 is a deficient number, since it is larger than the sum of its proper divisors (3259).

1399241 is an equidigital number, since it uses as much as digits as its factorization.

1399241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3258.

The product of its digits is 1944, while the sum is 29.

The square root of 1399241 is about 1182.8951770973. The cubic root of 1399241 is about 111.8486742464.

The spelling of 1399241 in words is "one million, three hundred ninety-nine thousand, two hundred forty-one".