1645332 has 48 divisors (see below), whose sum is σ = 4233600. Its totient is φ = 494208.

The previous prime is 1645327. The next prime is 1645337. The reversal of 1645332 is 2335461.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1645327) and next prime (1645337).

It is a d-powerful number, because it can be written as 1 + 6⁶ + 4⁶ + 5 + 3⁵ + 3¹³ + 2³ .

Its product of digits (2160) is a multiple of the sum of its prime divisors (270).

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645337) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8169 + ... + 8367.

It is an arithmetic number, because the mean of its divisors is an integer number (88200).

2^1645332 is an apocalyptic number.

1645332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1645332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2116800).

1645332 is an abundant number, since it is smaller than the sum of its proper divisors (2588268).

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

1645332 is a wasteful number, since it uses less digits than its factorization.

1645332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272 (or 270 counting only the distinct ones).

The product of its digits is 2160, while the sum is 24.

The square root of 1645332 is about 1282.7049543835. The cubic root of 1645332 is about 118.0550351339.

The spelling of 1645332 in words is "one million, six hundred forty-five thousand, three hundred thirty-two".