1287040 has 32 divisors (see below), whose sum is σ = 3078360. Its totient is φ = 514560.

The previous prime is 1287007. The next prime is 1287047. The reversal of 1287040 is 407821.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 366 + ... + 1645.

2^1287040 is an apocalyptic number.

1287040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1287040 is an abundant number, since it is smaller than the sum of its proper divisors (1791320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1287040 is an equidigital number, since it uses as much as digits as its factorization.

1287040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2030 (or 2018 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 1287040 is about 1134.4778534639. The cubic root of 1287040 is about 108.7753981283.

The spelling of 1287040 in words is "one million, two hundred eighty-seven thousand, forty".