1601916 has 12 divisors (see below), whose sum is σ = 3737832. Its totient is φ = 533968.

The previous prime is 1601869. The next prime is 1601953. The reversal of 1601916 is 6191061.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1601916² = 5132269742112, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 66735 + ... + 66758.

It is an arithmetic number, because the mean of its divisors is an integer number (311486).

2^1601916 is an apocalyptic number.

It is an amenable number.

1601916 is an abundant number, since it is smaller than the sum of its proper divisors (2135916).

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

1601916 is a wasteful number, since it uses less digits than its factorization.

1601916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133500 (or 133498 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 1601916 is about 1265.6682029663. The cubic root of 1601916 is about 117.0073777216.

Adding to 1601916 its reverse (6191061), we get a palindrome (7792977).

The spelling of 1601916 in words is "one million, six hundred one thousand, nine hundred sixteen".