1555116 has 12 divisors (see below), whose sum is σ = 3628632. Its totient is φ = 518368.

The previous prime is 1555111. The next prime is 1555117. The reversal of 1555116 is 6115551.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (1555111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64785 + ... + 64808.

It is an arithmetic number, because the mean of its divisors is an integer number (302386).

2^1555116 is an apocalyptic number.

It is an amenable number.

1555116 is an abundant number, since it is smaller than the sum of its proper divisors (2073516).

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

1555116 is a wasteful number, since it uses less digits than its factorization.

1555116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129600 (or 129598 counting only the distinct ones).

The product of its digits is 750, while the sum is 24.

The square root of 1555116 is about 1247.0429022291. The cubic root of 1555116 is about 115.8566401813.

The spelling of 1555116 in words is "one million, five hundred fifty-five thousand, one hundred sixteen".