1145987 has 4 divisors (see below), whose sum is σ = 1213416. Its totient is φ = 1078560.

The previous prime is 1145983. The next prime is 1145999. The reversal of 1145987 is 7895411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7895411 = 41 ⋅192571.

It is a cyclic number.

It is not a de Polignac number, because 1145987 - 2² = 1145983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1145983) 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, 33689 + ... + 33722.

It is an arithmetic number, because the mean of its divisors is an integer number (303354).

2^1145987 is an apocalyptic number.

1145987 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1145987 is a deficient number, since it is larger than the sum of its proper divisors (67429).

1145987 is an equidigital number, since it uses as much as digits as its factorization.

1145987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67428.

The product of its digits is 10080, while the sum is 35.

The square root of 1145987 is about 1070.5078234184. The cubic root of 1145987 is about 104.6469472544.

The spelling of 1145987 in words is "one million, one hundred forty-five thousand, nine hundred eighty-seven".