1399047 has 16 divisors (see below), whose sum is σ = 2079840. Its totient is φ = 830592.

The previous prime is 1399039. The next prime is 1399063. The reversal of 1399047 is 7409931.

It is not a de Polignac number, because 1399047 - 2³ = 1399039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1398999 and 1399017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399037) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 513 + ... + 1749.

It is an arithmetic number, because the mean of its divisors is an integer number (129990).

2^1399047 is an apocalyptic number.

1399047 is a deficient number, since it is larger than the sum of its proper divisors (680793).

1399047 is a wasteful number, since it uses less digits than its factorization.

1399047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1282.

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 1399047 is about 1182.8131720606. The cubic root of 1399047 is about 111.8435048615.

The spelling of 1399047 in words is "one million, three hundred ninety-nine thousand, forty-seven".