1391016 has 48 divisors (see below), whose sum is σ = 3830400. Its totient is φ = 420640.

The previous prime is 1391011. The next prime is 1391023. The reversal of 1391016 is 6101931.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1390983 and 1391001.

It is not an unprimeable number, because it can be changed into a prime (1391011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2665 + ... + 3143.

It is an arithmetic number, because the mean of its divisors is an integer number (79800).

2^1391016 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1391016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1915200).

1391016 is an abundant number, since it is smaller than the sum of its proper divisors (2439384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1391016 is a wasteful number, since it uses less digits than its factorization.

1391016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510 (or 495 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 21.

The square root of 1391016 is about 1179.4134135239. The cubic root of 1391016 is about 111.6290876248.

Adding to 1391016 its reverse (6101931), we get a palindrome (7492947).

Subtracting 1391016 from its reverse (6101931), we obtain a triangular number (4710915 = T₃₀₆₉).

The spelling of 1391016 in words is "one million, three hundred ninety-one thousand, sixteen".