1622881 has 8 divisors (see below), whose sum is σ = 1804544. Its totient is φ = 1449360.

The previous prime is 1622879. The next prime is 1622917. The reversal of 1622881 is 1882261.

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

It is a cyclic number.

It is not a de Polignac number, because 1622881 - 2¹ = 1622879 is a prime.

It is a super-2 number, since 2×1622881² = 5267485480322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1622861) 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, 1611 + ... + 2416.

It is an arithmetic number, because the mean of its divisors is an integer number (225568).

2^1622881 is an apocalyptic number.

1622881 is the 806-th heptagonal number.

1622881 is the 736-th hex number.

It is an amenable number.

1622881 is a deficient number, since it is larger than the sum of its proper divisors (181663).

1622881 is a wasteful number, since it uses less digits than its factorization.

1622881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4071.

The product of its digits is 1536, while the sum is 28.

The square root of 1622881 is about 1273.9234670890. The cubic root of 1622881 is about 117.5156098169.

The spelling of 1622881 in words is "one million, six hundred twenty-two thousand, eight hundred eighty-one".