1127987 has 4 divisors (see below), whose sum is σ = 1289136. Its totient is φ = 966840.

The previous prime is 1127983. The next prime is 1127993. The reversal of 1127987 is 7897211.

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

It is not a de Polignac number, because 1127987 - 2² = 1127983 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1127981) 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, 80564 + ... + 80577.

It is an arithmetic number, because the mean of its divisors is an integer number (322284).

2^1127987 is an apocalyptic number.

1127987 is a deficient number, since it is larger than the sum of its proper divisors (161149).

1127987 is an equidigital number, since it uses as much as digits as its factorization.

1127987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161148.

The product of its digits is 7056, while the sum is 35.

The square root of 1127987 is about 1062.0673236664. The cubic root of 1127987 is about 104.0961573682.

The spelling of 1127987 in words is "one million, one hundred twenty-seven thousand, nine hundred eighty-seven".