1387056 has 80 divisors (see below), whose sum is σ = 4071168. Its totient is φ = 403200.

The previous prime is 1387039. The next prime is 1387069. The reversal of 1387056 is 6507831.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19501 + ... + 19571.

2^1387056 is an apocalyptic number.

1387056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1387056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2035584).

1387056 is an abundant number, since it is smaller than the sum of its proper divisors (2684112).

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

1387056 is a wasteful number, since it uses less digits than its factorization.

1387056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 1387056 is about 1177.7334163553. The cubic root of 1387056 is about 111.5230568926.

The spelling of 1387056 in words is "one million, three hundred eighty-seven thousand, fifty-six".