1661532 has 12 divisors (see below), whose sum is σ = 3876936. Its totient is φ = 553840.

The previous prime is 1661519. The next prime is 1661549. The reversal of 1661532 is 2351661.

It is a tau number, because it is divible by the number of its divisors (12).

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 in 3 ways as a sum of consecutive naturals, for example, 69219 + ... + 69242.

It is an arithmetic number, because the mean of its divisors is an integer number (323078).

2^1661532 is an apocalyptic number.

1661532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1661532 is an abundant number, since it is smaller than the sum of its proper divisors (2215404).

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

1661532 is a wasteful number, since it uses less digits than its factorization.

1661532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138468 (or 138466 counting only the distinct ones).

The product of its digits is 1080, while the sum is 24.

The square root of 1661532 is about 1289.0042668665. The cubic root of 1661532 is about 118.4412284896.

The spelling of 1661532 in words is "one million, six hundred sixty-one thousand, five hundred thirty-two".