1661024 has 12 divisors (see below), whose sum is σ = 3270204. Its totient is φ = 830496.

The previous prime is 1661021. The next prime is 1661029. The reversal of 1661024 is 4201661.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1660987 and 1661005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1661021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25922 + ... + 25985.

It is an arithmetic number, because the mean of its divisors is an integer number (272517).

2^1661024 is an apocalyptic number.

It is an amenable number.

1661024 is a deficient number, since it is larger than the sum of its proper divisors (1609180).

1661024 is an equidigital number, since it uses as much as digits as its factorization.

1661024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51917 (or 51909 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1661024 is about 1288.8072004765. The cubic root of 1661024 is about 118.4291564426.

Adding to 1661024 its reverse (4201661), we get a palindrome (5862685).

The spelling of 1661024 in words is "one million, six hundred sixty-one thousand, twenty-four".