1287130 has 16 divisors (see below), whose sum is σ = 2495304. Its totient is φ = 475200.

The previous prime is 1287109. The next prime is 1287131. The reversal of 1287130 is 317821.

It can be written as a sum of positive squares in 4 ways, for example, as 1121481 + 165649 = 1059^2 + 407^2 .

It is not an unprimeable number, because it can be changed into a prime (1287131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4821 + ... + 5080.

2^1287130 is an apocalyptic number.

1287130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1287130 is a deficient number, since it is larger than the sum of its proper divisors (1208174).

1287130 is a wasteful number, since it uses less digits than its factorization.

1287130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9921.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 1287130 is about 1134.5175185955. The cubic root of 1287130 is about 108.7779335475. Note that the first 3 decimals are identical.

The spelling of 1287130 in words is "one million, two hundred eighty-seven thousand, one hundred thirty".