1661102 has 4 divisors (see below), whose sum is σ = 2491656. Its totient is φ = 830550.

The previous prime is 1661069. The next prime is 1661111. The reversal of 1661102 is 2011661.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 415274 + ... + 415277.

It is an arithmetic number, because the mean of its divisors is an integer number (622914).

2^1661102 is an apocalyptic number.

1661102 is a deficient number, since it is larger than the sum of its proper divisors (830554).

1661102 is an equidigital number, since it uses as much as digits as its factorization.

1661102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830553.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1661102 is about 1288.8374606598. The cubic root of 1661102 is about 118.4310101846.

Adding to 1661102 its reverse (2011661), we get a palindrome (3672763).

The spelling of 1661102 in words is "one million, six hundred sixty-one thousand, one hundred two".