1120387 has 4 divisors (see below), whose sum is σ = 1138816. Its totient is φ = 1101960.

The previous prime is 1120369. The next prime is 1120391. The reversal of 1120387 is 7830211.

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

It is a cyclic number.

It is not a de Polignac number, because 1120387 - 2¹¹ = 1118339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1120337) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 9123 + ... + 9244.

It is an arithmetic number, because the mean of its divisors is an integer number (284704).

2^1120387 is an apocalyptic number.

1120387 is a deficient number, since it is larger than the sum of its proper divisors (18429).

1120387 is an equidigital number, since it uses as much as digits as its factorization.

1120387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18428.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 1120387 is about 1058.4833489479. The cubic root of 1120387 is about 103.8618419407.

Adding to 1120387 its reverse (7830211), we get a palindrome (8950598).

The spelling of 1120387 in words is "one million, one hundred twenty thousand, three hundred eighty-seven".