1387006 has 4 divisors (see below), whose sum is σ = 2080512. Its totient is φ = 693502.

The previous prime is 1386991. The next prime is 1387007. The reversal of 1387006 is 6007831.

It is a semiprime because it is the product of two primes.

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 (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 346750 + ... + 346753.

It is an arithmetic number, because the mean of its divisors is an integer number (520128).

2^1387006 is an apocalyptic number.

1387006 is a deficient number, since it is larger than the sum of its proper divisors (693506).

1387006 is an equidigital number, since it uses as much as digits as its factorization.

1387006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693505.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 1387006 is about 1177.7121889494. The cubic root of 1387006 is about 111.5217168314.

The spelling of 1387006 in words is "one million, three hundred eighty-seven thousand, six".