1391916 has 24 divisors (see below), whose sum is σ = 3270064. Its totient is φ = 460800.

The previous prime is 1391899. The next prime is 1391917. The reversal of 1391916 is 6191931.

It is not an unprimeable number, because it can be changed into a prime (1391917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2016 + ... + 2616.

2^1391916 is an apocalyptic number.

It is an amenable number.

1391916 is an abundant number, since it is smaller than the sum of its proper divisors (1878148).

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

1391916 is a wasteful number, since it uses less digits than its factorization.

1391916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801 (or 799 counting only the distinct ones).

The product of its digits is 1458, while the sum is 30.

The square root of 1391916 is about 1179.7948974292. The cubic root of 1391916 is about 111.6531574460.

Adding to 1391916 its sum of digits (30), we get a triangular number (1391946 = T₁₆₆₈).

The spelling of 1391916 in words is "one million, three hundred ninety-one thousand, nine hundred sixteen".