1387072 has 14 divisors (see below), whose sum is σ = 2752598. Its totient is φ = 693504.

The previous prime is 1387069. The next prime is 1387109. The reversal of 1387072 is 2707831.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1382976 + 4096 = 1176^2 + 64^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1387072.

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, 10773 + ... + 10900.

2^1387072 is an apocalyptic number.

It is an amenable number.

1387072 is a deficient number, since it is larger than the sum of its proper divisors (1365526).

1387072 is an equidigital number, since it uses as much as digits as its factorization.

1387072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21685 (or 21675 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 1387072 is about 1177.7402090444. The cubic root of 1387072 is about 111.5234857054.

The spelling of 1387072 in words is "one million, three hundred eighty-seven thousand, seventy-two".