1287180 has 36 divisors (see below), whose sum is σ = 3904992. Its totient is φ = 343200.

The previous prime is 1287179. The next prime is 1287197. The reversal of 1287180 is 817821.

It is a tau number, because it is divible by the number of its divisors (36).

It is a nialpdrome in base 6.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3396 + ... + 3755.

It is an arithmetic number, because the mean of its divisors is an integer number (108472).

2^1287180 is an apocalyptic number.

1287180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1287180 is an abundant number, since it is smaller than the sum of its proper divisors (2617812).

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

1287180 is a wasteful number, since it uses less digits than its factorization.

1287180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7166 (or 7161 counting only the distinct ones).

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

The square root of 1287180 is about 1134.5395541805. The cubic root of 1287180 is about 108.7793420626.

The spelling of 1287180 in words is "one million, two hundred eighty-seven thousand, one hundred eighty".