1288155 has 32 divisors (see below), whose sum is σ = 2320128. Its totient is φ = 604800.

The previous prime is 1288117. The next prime is 1288163. The reversal of 1288155 is 5518821.

It is not a de Polignac number, because 1288155 - 2⁸ = 1287899 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6000 + ... + 6210.

It is an arithmetic number, because the mean of its divisors is an integer number (72504).

2^1288155 is an apocalyptic number.

1288155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1288155 is a deficient number, since it is larger than the sum of its proper divisors (1031973).

1288155 is a wasteful number, since it uses less digits than its factorization.

1288155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267.

The product of its digits is 3200, while the sum is 30.

The square root of 1288155 is about 1134.9691625767. The cubic root of 1288155 is about 108.8068008202.

The spelling of 1288155 in words is "one million, two hundred eighty-eight thousand, one hundred fifty-five".