1288501 has 4 divisors (see below), whose sum is σ = 1310400. Its totient is φ = 1266604.

The previous prime is 1288487. The next prime is 1288513. The reversal of 1288501 is 1058821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1288501 - 2⁹ = 1287989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1288531) 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 3 ways as a sum of consecutive naturals, for example, 10861 + ... + 10978.

It is an arithmetic number, because the mean of its divisors is an integer number (327600).

2^1288501 is an apocalyptic number.

It is an amenable number.

1288501 is a deficient number, since it is larger than the sum of its proper divisors (21899).

1288501 is an equidigital number, since it uses as much as digits as its factorization.

1288501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21898.

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 1288501 is about 1135.1215793914. The cubic root of 1288501 is about 108.8165418278.

The spelling of 1288501 in words is "one million, two hundred eighty-eight thousand, five hundred one".