1606420 has 24 divisors (see below), whose sum is σ = 3483648. Its totient is φ = 621600.

The previous prime is 1606403. The next prime is 1606427. The reversal of 1606420 is 246061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1606427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 676 + ... + 1915.

It is an arithmetic number, because the mean of its divisors is an integer number (145152).

2^1606420 is an apocalyptic number.

1606420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1606420 is an abundant number, since it is smaller than the sum of its proper divisors (1877228).

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

1606420 is a wasteful number, since it uses less digits than its factorization.

1606420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2631 (or 2629 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1606420 is about 1267.4462513259. The cubic root of 1606420 is about 117.1169357109.

The spelling of 1606420 in words is "one million, six hundred six thousand, four hundred twenty".