1288551 has 8 divisors (see below), whose sum is σ = 1874304. Its totient is φ = 780920.

The previous prime is 1288543. The next prime is 1288559. The reversal of 1288551 is 1558821.

It is an interprime number because it is at equal distance from previous prime (1288543) and next prime (1288559).

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

It is a cyclic number.

It is not a de Polignac number, because 1288551 - 2³ = 1288543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1288559) 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, 19491 + ... + 19556.

It is an arithmetic number, because the mean of its divisors is an integer number (234288).

2^1288551 is an apocalyptic number.

1288551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1288551 is a deficient number, since it is larger than the sum of its proper divisors (585753).

1288551 is a wasteful number, since it uses less digits than its factorization.

1288551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39061.

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

The square root of 1288551 is about 1135.1436032503. The cubic root of 1288551 is about 108.8179493436.

The spelling of 1288551 in words is "one million, two hundred eighty-eight thousand, five hundred fifty-one".