1288251 has 8 divisors (see below), whose sum is σ = 1908560. Its totient is φ = 858816.

The previous prime is 1288249. The next prime is 1288291. The reversal of 1288251 is 1528821.

It is not a de Polignac number, because 1288251 - 2¹ = 1288249 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 47713 = 1288251 / (1 + 2 + 8 + 8 + 2 + 5 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1288201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23830 + ... + 23883.

It is an arithmetic number, because the mean of its divisors is an integer number (238570).

2^1288251 is an apocalyptic number.

1288251 is a deficient number, since it is larger than the sum of its proper divisors (620309).

1288251 is an equidigital number, since it uses as much as digits as its factorization.

1288251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47722 (or 47716 counting only the distinct ones).

The product of its digits is 1280, while the sum is 27.

The square root of 1288251 is about 1135.0114536867. The cubic root of 1288251 is about 108.8095037023.

The spelling of 1288251 in words is "one million, two hundred eighty-eight thousand, two hundred fifty-one".