1287488 has 14 divisors (see below), whose sum is σ = 2554986. Its totient is φ = 643712.

The previous prime is 1287487. The next prime is 1287491. The reversal of 1287488 is 8847821.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 937024 + 350464 = 968^2 + 592^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9995 + ... + 10122.

It is an arithmetic number, because the mean of its divisors is an integer number (182499).

2^1287488 is an apocalyptic number.

It is an amenable number.

1287488 is a deficient number, since it is larger than the sum of its proper divisors (1267498).

1287488 is an equidigital number, since it uses as much as digits as its factorization.

1287488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20129 (or 20119 counting only the distinct ones).

The product of its digits is 28672, while the sum is 38.

The square root of 1287488 is about 1134.6752839469. The cubic root of 1287488 is about 108.7880177116.

The spelling of 1287488 in words is "one million, two hundred eighty-seven thousand, four hundred eighty-eight".