1387087 has 4 divisors (see below), whose sum is σ = 1493800. Its totient is φ = 1280376.

The previous prime is 1387069. The next prime is 1387109. The reversal of 1387087 is 7807831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7807831 = 1451 ⋅5381.

It is a cyclic number.

It is not a de Polignac number, because 1387087 - 2¹¹ = 1385039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1387007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53337 + ... + 53362.

It is an arithmetic number, because the mean of its divisors is an integer number (373450).

2^1387087 is an apocalyptic number.

1387087 is a deficient number, since it is larger than the sum of its proper divisors (106713).

1387087 is a wasteful number, since it uses less digits than its factorization.

1387087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106712.

The product of its (nonzero) digits is 9408, while the sum is 34.

The square root of 1387087 is about 1177.7465771549. The cubic root of 1387087 is about 111.5238877144.

It can be divided in two parts, 138 and 7087, that added together give a square (7225 = 85²).

The spelling of 1387087 in words is "one million, three hundred eighty-seven thousand, eighty-seven".