1871280 has 120 divisors (see below), whose sum is σ = 6615648. Its totient is φ = 473088.

The previous prime is 1871279. The next prime is 1871293. The reversal of 1871280 is 821781.

It is a tau number, because it is divible by the number of its divisors (120).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16504 + ... + 16616.

2^1871280 is an apocalyptic number.

1871280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1871280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3307824).

1871280 is an abundant number, since it is smaller than the sum of its proper divisors (4744368).

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

1871280 is a wasteful number, since it uses less digits than its factorization.

1871280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155 (or 146 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 1871280 is about 1367.9473674086. The cubic root of 1871280 is about 123.2290003131.

The spelling of 1871280 in words is "one million, eight hundred seventy-one thousand, two hundred eighty".