1661548 has 12 divisors (see below), whose sum is σ = 3323152. Its totient is φ = 712080.

The previous prime is 1661519. The next prime is 1661549. The reversal of 1661548 is 8451661.

1661548 is an admirable number.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1661549) by changing a digit.

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, 29643 + ... + 29698.

2^1661548 is an apocalyptic number.

It is an amenable number.

1661548 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1661548 is a wasteful number, since it uses less digits than its factorization.

1661548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59352 (or 59350 counting only the distinct ones).

The product of its digits is 5760, while the sum is 31.

The square root of 1661548 is about 1289.0104731925. The cubic root of 1661548 is about 118.4416086716.

It can be divided in two parts, 1661 and 548, that added together give a square (2209 = 47²).

The spelling of 1661548 in words is "one million, six hundred sixty-one thousand, five hundred forty-eight".