1861622 has 16 divisors (see below), whose sum is σ = 3224832. Its totient is φ = 789480.

The previous prime is 1861621. The next prime is 1861631. The reversal of 1861622 is 2261681.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 1861591 and 1861600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1861621) 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, 797 + ... + 2087.

It is an arithmetic number, because the mean of its divisors is an integer number (201552).

2^1861622 is an apocalyptic number.

1861622 is a deficient number, since it is larger than the sum of its proper divisors (1363210).

1861622 is a wasteful number, since it uses less digits than its factorization.

1861622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1403.

The product of its digits is 1152, while the sum is 26.

The square root of 1861622 is about 1364.4126941655. The cubic root of 1861622 is about 123.0166324700.

The spelling of 1861622 in words is "one million, eight hundred sixty-one thousand, six hundred twenty-two".