1620572 has 6 divisors (see below), whose sum is σ = 2836008. Its totient is φ = 810284.

The previous prime is 1620571. The next prime is 1620589. The reversal of 1620572 is 2750261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620571) 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 as a sum of consecutive naturals, namely, 202568 + ... + 202575.

It is an arithmetic number, because the mean of its divisors is an integer number (472668).

2^1620572 is an apocalyptic number.

It is an amenable number.

1620572 is a deficient number, since it is larger than the sum of its proper divisors (1215436).

1620572 is a wasteful number, since it uses less digits than its factorization.

1620572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405147 (or 405145 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 1620572 is about 1273.0168891260. The cubic root of 1620572 is about 117.4598504745.

The spelling of 1620572 in words is "one million, six hundred twenty thousand, five hundred seventy-two".