11887115 has 4 divisors (see below), whose sum is σ = 14264544. Its totient is φ = 9509688.

The previous prime is 11887111. The next prime is 11887121. The reversal of 11887115 is 51178811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51178811 = 281 ⋅182131.

It is a cyclic number.

It is not a de Polignac number, because 11887115 - 2² = 11887111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11887111) 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 3 ways as a sum of consecutive naturals, for example, 1188707 + ... + 1188716.

It is an arithmetic number, because the mean of its divisors is an integer number (3566136).

Almost surely, 2^11887115 is an apocalyptic number.

11887115 is a deficient number, since it is larger than the sum of its proper divisors (2377429).

11887115 is an equidigital number, since it uses as much as digits as its factorization.

11887115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2377428.

The product of its digits is 2240, while the sum is 32.

The square root of 11887115 is about 3447.7695688662. The cubic root of 11887115 is about 228.2226907548. Note that the first 3 decimals are identical.

The spelling of 11887115 in words is "eleven million, eight hundred eighty-seven thousand, one hundred fifteen".