1555872 has 48 divisors (see below), whose sum is σ = 4304160. Its totient is φ = 490752.

The previous prime is 1555861. The next prime is 1555901. The reversal of 1555872 is 2785551.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1398 + ... + 2250.

It is an arithmetic number, because the mean of its divisors is an integer number (89670).

2^1555872 is an apocalyptic number.

1555872 is a gapful number since it is divisible by the number (12) 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 1555872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2152080).

1555872 is an abundant number, since it is smaller than the sum of its proper divisors (2748288).

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

1555872 is a wasteful number, since it uses less digits than its factorization.

1555872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885 (or 877 counting only the distinct ones).

The product of its digits is 14000, while the sum is 33.

The square root of 1555872 is about 1247.3459824764. The cubic root of 1555872 is about 115.8754112206.

The spelling of 1555872 in words is "one million, five hundred fifty-five thousand, eight hundred seventy-two".