1399071 has 4 divisors (see below), whose sum is σ = 1865432. Its totient is φ = 932712.

The previous prime is 1399063. The next prime is 1399109. The reversal of 1399071 is 1709931.

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

It is not a de Polignac number, because 1399071 - 2³ = 1399063 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399271) 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, 233176 + ... + 233181.

It is an arithmetic number, because the mean of its divisors is an integer number (466358).

2^1399071 is an apocalyptic number.

1399071 is a deficient number, since it is larger than the sum of its proper divisors (466361).

1399071 is an equidigital number, since it uses as much as digits as its factorization.

1399071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466360.

The product of its (nonzero) digits is 1701, while the sum is 30.

The square root of 1399071 is about 1182.8233173217. The cubic root of 1399071 is about 111.8441443989.

The spelling of 1399071 in words is "one million, three hundred ninety-nine thousand, seventy-one".