1399447 has 4 divisors (see below), whose sum is σ = 1599376. Its totient is φ = 1199520.

The previous prime is 1399441. The next prime is 1399469. The reversal of 1399447 is 7449931.

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

It is not a de Polignac number, because 1399447 - 2³ = 1399439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399441) 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, 99954 + ... + 99967.

It is an arithmetic number, because the mean of its divisors is an integer number (399844).

2^1399447 is an apocalyptic number.

1399447 is a deficient number, since it is larger than the sum of its proper divisors (199929).

1399447 is an equidigital number, since it uses as much as digits as its factorization.

1399447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199928.

The product of its digits is 27216, while the sum is 37.

The square root of 1399447 is about 1182.9822483875. The cubic root of 1399447 is about 111.8541628639.

It can be divided in two parts, 13994 and 47, that added together give a palindrome (14041).

The spelling of 1399447 in words is "one million, three hundred ninety-nine thousand, four hundred forty-seven".