1622871 has 12 divisors (see below), whose sum is σ = 2482272. Its totient is φ = 1018176.

The previous prime is 1622867. The next prime is 1622879. The reversal of 1622871 is 1782261.

It is not a de Polignac number, because 1622871 - 2² = 1622867 is a prime.

1622871 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1622879) 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, 5151 + ... + 5456.

It is an arithmetic number, because the mean of its divisors is an integer number (206856).

2^1622871 is an apocalyptic number.

1622871 is a deficient number, since it is larger than the sum of its proper divisors (859401).

1622871 is a wasteful number, since it uses less digits than its factorization.

1622871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10630 (or 10627 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 1622871 is about 1273.9195422004. The cubic root of 1622871 is about 117.5153684440.

The spelling of 1622871 in words is "one million, six hundred twenty-two thousand, eight hundred seventy-one".