1661032 has 8 divisors (see below), whose sum is σ = 3114450. Its totient is φ = 830512.

The previous prime is 1661029. The next prime is 1661059. The reversal of 1661032 is 2301661.

It can be written as a sum of positive squares in only one way, i.e., 1179396 + 481636 = 1086^2 + 694^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103807 + ... + 103822.

2^1661032 is an apocalyptic number.

It is an amenable number.

1661032 is a deficient number, since it is larger than the sum of its proper divisors (1453418).

1661032 is a wasteful number, since it uses less digits than its factorization.

1661032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207635 (or 207631 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 1661032 is about 1288.8103041177. The cubic root of 1661032 is about 118.4293465727.

Adding to 1661032 its reverse (2301661), we get a palindrome (3962693).

The spelling of 1661032 in words is "one million, six hundred sixty-one thousand, thirty-two".