1661488 has 10 divisors (see below), whose sum is σ = 3219164. Its totient is φ = 830736.

The previous prime is 1661479. The next prime is 1661489. The reversal of 1661488 is 8841661.

It is not an unprimeable number, because it can be changed into a prime (1661489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51906 + ... + 51937.

2^1661488 is an apocalyptic number.

It is an amenable number.

1661488 is a deficient number, since it is larger than the sum of its proper divisors (1557676).

1661488 is a wasteful number, since it uses less digits than its factorization.

1661488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103851 (or 103845 counting only the distinct ones).

The product of its digits is 9216, while the sum is 34.

The square root of 1661488 is about 1288.9871993158. The cubic root of 1661488 is about 118.4401829766.

It can be divided in two parts, 16 and 61488, that added together give a square (61504 = 248²).

The spelling of 1661488 in words is "one million, six hundred sixty-one thousand, four hundred eighty-eight".