1387611 has 20 divisors (see below), whose sum is σ = 2133472. Its totient is φ = 898128.

The previous prime is 1387601. The next prime is 1387649. The reversal of 1387611 is 1167831.

It is not a de Polignac number, because 1387611 - 2⁵ = 1387579 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1387601) 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 19 ways as a sum of consecutive naturals, for example, 2766 + ... + 3228.

2^1387611 is an apocalyptic number.

1387611 is a deficient number, since it is larger than the sum of its proper divisors (745861).

1387611 is an equidigital number, since it uses as much as digits as its factorization.

1387611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512 (or 503 counting only the distinct ones).

The product of its digits is 1008, while the sum is 27.

The square root of 1387611 is about 1177.9690148726. The cubic root of 1387611 is about 111.5379294099.

The spelling of 1387611 in words is "one million, three hundred eighty-seven thousand, six hundred eleven".