1620153 has 12 divisors (see below), whose sum is σ = 2416128. Its totient is φ = 1045080.

The previous prime is 1620133. The next prime is 1620161. The reversal of 1620153 is 3510261.

It is not a de Polignac number, because 1620153 - 2⁵ = 1620121 is a prime.

1620153 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1620103) 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 in 11 ways as a sum of consecutive naturals, for example, 2625 + ... + 3182.

It is an arithmetic number, because the mean of its divisors is an integer number (201344).

2^1620153 is an apocalyptic number.

It is an amenable number.

1620153 is a deficient number, since it is larger than the sum of its proper divisors (795975).

1620153 is a wasteful number, since it uses less digits than its factorization.

1620153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5844 (or 5841 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 1620153 is about 1272.8523087931. The cubic root of 1620153 is about 117.4497264937.

The spelling of 1620153 in words is "one million, six hundred twenty thousand, one hundred fifty-three".