1606549 has 4 divisors (see below), whose sum is σ = 1836064. Its totient is φ = 1377036.

The previous prime is 1606547. The next prime is 1606559. The reversal of 1606549 is 9456061.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1606549 - 2¹ = 1606547 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1606549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1606541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114747 + ... + 114760.

It is an arithmetic number, because the mean of its divisors is an integer number (459016).

2^1606549 is an apocalyptic number.

It is an amenable number.

1606549 is a deficient number, since it is larger than the sum of its proper divisors (229515).

1606549 is an equidigital number, since it uses as much as digits as its factorization.

1606549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229514.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 1606549 is about 1267.4971400362. The cubic root of 1606549 is about 117.1200705657.

The spelling of 1606549 in words is "one million, six hundred six thousand, five hundred forty-nine".