1671616 has 14 divisors (see below), whose sum is σ = 3317240. Its totient is φ = 835776.

The previous prime is 1671599. The next prime is 1671619. The reversal of 1671616 is 6161761.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1671619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12996 + ... + 13123.

2^1671616 is an apocalyptic number.

1671616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1671616 is a deficient number, since it is larger than the sum of its proper divisors (1645624).

1671616 is an equidigital number, since it uses as much as digits as its factorization.

1671616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26131 (or 26121 counting only the distinct ones).

The product of its digits is 1512, while the sum is 28.

The square root of 1671616 is about 1292.9098963192. The cubic root of 1671616 is about 118.6803558392.

The spelling of 1671616 in words is "one million, six hundred seventy-one thousand, six hundred sixteen".