1399016 has 8 divisors (see below), whose sum is σ = 2623170. Its totient is φ = 699504.

The previous prime is 1399009. The next prime is 1399019. The reversal of 1399016 is 6109931.

It can be written as a sum of positive squares in only one way, i.e., 894916 + 504100 = 946^2 + 710^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 1399016.

It is not an unprimeable number, because it can be changed into a prime (1399019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 87431 + ... + 87446.

2^1399016 is an apocalyptic number.

It is an amenable number.

1399016 is a deficient number, since it is larger than the sum of its proper divisors (1224154).

1399016 is a wasteful number, since it uses less digits than its factorization.

1399016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174883 (or 174879 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 29.

The square root of 1399016 is about 1182.8000676361. The cubic root of 1399016 is about 111.8426787815.

Subtracting 1399016 from its reverse (6109931), we obtain a triangular number (4710915 = T₃₀₆₉).

The spelling of 1399016 in words is "one million, three hundred ninety-nine thousand, sixteen".