1641216 has 36 divisors (see below), whose sum is σ = 4370072. Its totient is φ = 546816.

The previous prime is 1641161. The next prime is 1641217. The reversal of 1641216 is 6121461.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1641192 and 1641201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 301 + ... + 1836.

2^1641216 is an apocalyptic number.

1641216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1641216 is an abundant number, since it is smaller than the sum of its proper divisors (2728856).

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

1641216 is an equidigital number, since it uses as much as digits as its factorization.

1641216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2156 (or 2142 counting only the distinct ones).

The product of its digits is 288, while the sum is 21.

The square root of 1641216 is about 1281.0995277495. The cubic root of 1641216 is about 117.9565098758.

Adding to 1641216 its reverse (6121461), we get a palindrome (7762677).

The spelling of 1641216 in words is "one million, six hundred forty-one thousand, two hundred sixteen".