1288745 has 8 divisors (see below), whose sum is σ = 1569984. Its totient is φ = 1015344.

The previous prime is 1288733. The next prime is 1288769. The reversal of 1288745 is 5478821.

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 1288745 - 2¹⁴ = 1272361 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1589 + ... + 2258.

It is an arithmetic number, because the mean of its divisors is an integer number (196248).

2^1288745 is an apocalyptic number.

It is an amenable number.

1288745 is a deficient number, since it is larger than the sum of its proper divisors (281239).

1288745 is an equidigital number, since it uses as much as digits as its factorization.

1288745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3919.

The product of its digits is 17920, while the sum is 35.

The square root of 1288745 is about 1135.2290517777. The cubic root of 1288745 is about 108.8234101604.

The spelling of 1288745 in words is "one million, two hundred eighty-eight thousand, seven hundred forty-five".