1288131 has 8 divisors (see below), whose sum is σ = 1849680. Its totient is φ = 792672.

The previous prime is 1288117. The next prime is 1288163. The reversal of 1288131 is 1318821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1288131 - 2⁵ = 1288099 is a prime.

It is a super-2 number, since 2×1288131² = 3318562946322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1288171) 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, 16476 + ... + 16553.

It is an arithmetic number, because the mean of its divisors is an integer number (231210).

2^1288131 is an apocalyptic number.

1288131 is a deficient number, since it is larger than the sum of its proper divisors (561549).

1288131 is a wasteful number, since it uses less digits than its factorization.

1288131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33045.

The product of its digits is 384, while the sum is 24.

The square root of 1288131 is about 1134.9585895529. The cubic root of 1288131 is about 108.8061250787.

The spelling of 1288131 in words is "one million, two hundred eighty-eight thousand, one hundred thirty-one".