1606554 has 40 divisors (see below), whose sum is σ = 3693888. Its totient is φ = 521640.

The previous prime is 1606547. The next prime is 1606559. The reversal of 1606554 is 4556061.

It is a happy number.

1606554 is a `hidden beast` number, since 1 + 6 + 0 + 655 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (1606559) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7509 + ... + 7719.

2^1606554 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1606554, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1846944).

1606554 is an abundant number, since it is smaller than the sum of its proper divisors (2087334).

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

1606554 is a wasteful number, since it uses less digits than its factorization.

1606554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272 (or 263 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 1606554 is about 1267.4991124257. The cubic root of 1606554 is about 117.1201920683.

The spelling of 1606554 in words is "one million, six hundred six thousand, five hundred fifty-four".