1399671 has 24 divisors (see below), whose sum is σ = 2489760. Its totient is φ = 737856.

The previous prime is 1399663. The next prime is 1399679. The reversal of 1399671 is 1769931.

It is an interprime number because it is at equal distance from previous prime (1399663) and next prime (1399679).

It is not a de Polignac number, because 1399671 - 2³ = 1399663 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399679) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36 + ... + 1673.

It is an arithmetic number, because the mean of its divisors is an integer number (103740).

2^1399671 is an apocalyptic number.

1399671 is a deficient number, since it is larger than the sum of its proper divisors (1090089).

1399671 is a wasteful number, since it uses less digits than its factorization.

1399671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1735 (or 1732 counting only the distinct ones).

The product of its digits is 10206, while the sum is 36.

The square root of 1399671 is about 1183.0769205762. The cubic root of 1399671 is about 111.8601304582.

The spelling of 1399671 in words is "one million, three hundred ninety-nine thousand, six hundred seventy-one".