1871406 has 12 divisors (see below), whose sum is σ = 4054752. Its totient is φ = 623796.

The previous prime is 1871383. The next prime is 1871413. The reversal of 1871406 is 6041781.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1871406.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 51966 + ... + 52001.

It is an arithmetic number, because the mean of its divisors is an integer number (337896).

2^1871406 is an apocalyptic number.

1871406 is an abundant number, since it is smaller than the sum of its proper divisors (2183346).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1871406 is a wasteful number, since it uses less digits than its factorization.

1871406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103975 (or 103972 counting only the distinct ones).

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

The square root of 1871406 is about 1367.9934210368. The cubic root of 1871406 is about 123.2317660680.

The spelling of 1871406 in words is "one million, eight hundred seventy-one thousand, four hundred six".