11915855 has 8 divisors (see below), whose sum is σ = 16341792. Its totient is φ = 8170848.

The previous prime is 11915843. The next prime is 11915867. The reversal of 11915855 is 55851911.

It is an interprime number because it is at equal distance from previous prime (11915843) and next prime (11915867).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11915855 - 2¹⁰ = 11914831 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35), and also a Moran number because the ratio is a prime number: 340453 = 11915855 / (1 + 1 + 9 + 1 + 5 + 8 + 5 + 5).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170192 + ... + 170261.

It is an arithmetic number, because the mean of its divisors is an integer number (2042724).

Almost surely, 2^11915855 is an apocalyptic number.

11915855 is a deficient number, since it is larger than the sum of its proper divisors (4425937).

11915855 is an equidigital number, since it uses as much as digits as its factorization.

11915855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340465.

The product of its digits is 9000, while the sum is 35.

The square root of 11915855 is about 3451.9349646249. The cubic root of 11915855 is about 228.4064707309.

The spelling of 11915855 in words is "eleven million, nine hundred fifteen thousand, eight hundred fifty-five".