1622643 has 8 divisors (see below), whose sum is σ = 2360256. Its totient is φ = 983400.

The previous prime is 1622641. The next prime is 1622659. The reversal of 1622643 is 3462261.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1622643 - 2¹ = 1622641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1622641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24553 + ... + 24618.

It is an arithmetic number, because the mean of its divisors is an integer number (295032).

2^1622643 is an apocalyptic number.

1622643 is a deficient number, since it is larger than the sum of its proper divisors (737613).

1622643 is a wasteful number, since it uses less digits than its factorization.

1622643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49185.

The product of its digits is 1728, while the sum is 24.

The square root of 1622643 is about 1273.8300514590. The cubic root of 1622643 is about 117.5098648727.

The spelling of 1622643 in words is "one million, six hundred twenty-two thousand, six hundred forty-three".