11871478 has 4 divisors (see below), whose sum is σ = 17807220. Its totient is φ = 5935738.

The previous prime is 11871467. The next prime is 11871511. The reversal of 11871478 is 87417811.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2967868 + ... + 2967871.

It is an arithmetic number, because the mean of its divisors is an integer number (4451805).

Almost surely, 2^11871478 is an apocalyptic number.

11871478 is a deficient number, since it is larger than the sum of its proper divisors (5935742).

11871478 is an equidigital number, since it uses as much as digits as its factorization.

11871478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5935741.

The product of its digits is 12544, while the sum is 37.

The square root of 11871478 is about 3445.5011246552. The cubic root of 11871478 is about 228.1225743909.

The spelling of 11871478 in words is "eleven million, eight hundred seventy-one thousand, four hundred seventy-eight".