1641632 has 36 divisors (see below), whose sum is σ = 3402126. Its totient is φ = 779520.

The previous prime is 1641631. The next prime is 1641637. The reversal of 1641632 is 2361461.

It is a happy number.

1641632 is nontrivially palindromic in base 15.

It can be written as a sum of positive squares in 3 ways, for example, as 1008016 + 633616 = 1004^2 + 796^2 .

It is a zygodrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 1641598 and 1641607.

It is not an unprimeable number, because it can be changed into a prime (1641631) 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 in 5 ways as a sum of consecutive naturals, for example, 26882 + ... + 26942.

2^1641632 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 1641632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1701063).

1641632 is an abundant number, since it is smaller than the sum of its proper divisors (1760494).

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

1641632 is an equidigital number, since it uses as much as digits as its factorization.

1641632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129 (or 92 counting only the distinct ones).

The product of its digits is 864, while the sum is 23.

The square root of 1641632 is about 1281.2618779937. The cubic root of 1641632 is about 117.9664752028.

The spelling of 1641632 in words is "one million, six hundred forty-one thousand, six hundred thirty-two".