1287438 has 16 divisors (see below), whose sum is σ = 2588880. Its totient is φ = 426816.

The previous prime is 1287431. The next prime is 1287457. The reversal of 1287438 is 8347821.

It is a nialpdrome in base 6.

It is a junction number, because it is equal to n+sod(n) for n = 1287399 and 1287408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287431) 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, 906 + ... + 1842.

It is an arithmetic number, because the mean of its divisors is an integer number (161805).

2^1287438 is an apocalyptic number.

1287438 is an abundant number, since it is smaller than the sum of its proper divisors (1301442).

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

1287438 is a wasteful number, since it uses less digits than its factorization.

1287438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1171.

The product of its digits is 10752, while the sum is 33.

The square root of 1287438 is about 1134.6532509979. The cubic root of 1287438 is about 108.7866094211.

The spelling of 1287438 in words is "one million, two hundred eighty-seven thousand, four hundred thirty-eight".