1661324 has 12 divisors (see below), whose sum is σ = 3322704. Its totient is φ = 711984.

The previous prime is 1661311. The next prime is 1661327. The reversal of 1661324 is 4231661.

It is a happy number.

1661324 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 1661324.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1661327) 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, 29639 + ... + 29694.

It is an arithmetic number, because the mean of its divisors is an integer number (276892).

2^1661324 is an apocalyptic number.

1661324 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1661324 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1661324 is a wasteful number, since it uses less digits than its factorization.

1661324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59344 (or 59342 counting only the distinct ones).

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

The square root of 1661324 is about 1288.9235819086. The cubic root of 1661324 is about 118.4362859017.

Adding to 1661324 its reverse (4231661), we get a palindrome (5892985).

The spelling of 1661324 in words is "one million, six hundred sixty-one thousand, three hundred twenty-four".