1662549 has 16 divisors (see below), whose sum is σ = 2683008. Its totient is φ = 893952.

The previous prime is 1662547. The next prime is 1662553. The reversal of 1662549 is 9452661.

It is not a de Polignac number, because 1662549 - 2¹ = 1662547 is a prime.

It is a Curzon number.

1662549 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1662547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1972 + ... + 2685.

It is an arithmetic number, because the mean of its divisors is an integer number (167688).

2^1662549 is an apocalyptic number.

It is an amenable number.

1662549 is a deficient number, since it is larger than the sum of its proper divisors (1020459).

1662549 is a wasteful number, since it uses less digits than its factorization.

1662549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4684.

The product of its digits is 12960, while the sum is 33.

The square root of 1662549 is about 1289.3986970677. The cubic root of 1662549 is about 118.4653889555.

It can be divided in two parts, 1662 and 549, that added together give a triangular number (2211 = T₆₆).

The spelling of 1662549 in words is "one million, six hundred sixty-two thousand, five hundred forty-nine".