1387136 has 16 divisors (see below), whose sum is σ = 2763690. Its totient is φ = 693504.

The previous prime is 1387129. The next prime is 1387147. The reversal of 1387136 is 6317831.

It can be written as a sum of positive squares in only one way, i.e., 1308736 + 78400 = 1144^2 + 280^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a junction number, because it is equal to n+sod(n) for n = 1387099 and 1387108.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5291 + ... + 5546.

2^1387136 is an apocalyptic number.

1387136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1387136 is a deficient number, since it is larger than the sum of its proper divisors (1376554).

1387136 is an equidigital number, since it uses as much as digits as its factorization.

1387136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10851 (or 10839 counting only the distinct ones).

The product of its digits is 3024, while the sum is 29.

The square root of 1387136 is about 1177.7673794090. The cubic root of 1387136 is about 111.5252009236.

The spelling of 1387136 in words is "one million, three hundred eighty-seven thousand, one hundred thirty-six".