1622845 has 16 divisors (see below), whose sum is σ = 2246400. Its totient is φ = 1102464.

The previous prime is 1622839. The next prime is 1622849. The reversal of 1622845 is 5482261.

It is a cyclic number.

It is not a de Polignac number, because 1622845 - 2⁵ = 1622813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1622849) 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 15 ways as a sum of consecutive naturals, for example, 6849 + ... + 7081.

It is an arithmetic number, because the mean of its divisors is an integer number (140400).

2^1622845 is an apocalyptic number.

It is an amenable number.

1622845 is a deficient number, since it is larger than the sum of its proper divisors (623555).

1622845 is a wasteful number, since it uses less digits than its factorization.

1622845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444.

The product of its digits is 3840, while the sum is 28.

The square root of 1622845 is about 1273.9093374334. The cubic root of 1622845 is about 117.5147408698.

The spelling of 1622845 in words is "one million, six hundred twenty-two thousand, eight hundred forty-five".