1387073 has 4 divisors (see below), whose sum is σ = 1406148. Its totient is φ = 1368000.

The previous prime is 1387069. The next prime is 1387109. The reversal of 1387073 is 3707831.

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

It can be written as a sum of positive squares in 2 ways, for example, as 478864 + 908209 = 692^2 + 953^2 .

It is a cyclic number.

It is not a de Polignac number, because 1387073 - 2² = 1387069 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4387073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9428 + ... + 9573.

It is an arithmetic number, because the mean of its divisors is an integer number (351537).

2^1387073 is an apocalyptic number.

It is an amenable number.

1387073 is a deficient number, since it is larger than the sum of its proper divisors (19075).

1387073 is an equidigital number, since it uses as much as digits as its factorization.

1387073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19074.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 1387073 is about 1177.7406335862. The cubic root of 1387073 is about 111.5235125061.

The spelling of 1387073 in words is "one million, three hundred eighty-seven thousand, seventy-three".