11871530 has 16 divisors (see below), whose sum is σ = 23311584. Its totient is φ = 4316880.

The previous prime is 11871511. The next prime is 11871551. The reversal of 11871530 is 3517811.

It is a self number, because there is not a number n which added to its sum of digits gives 11871530.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 53852 + ... + 54071.

It is an arithmetic number, because the mean of its divisors is an integer number (1456974).

Almost surely, 2^11871530 is an apocalyptic number.

11871530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11871530 is a deficient number, since it is larger than the sum of its proper divisors (11440054).

11871530 is a wasteful number, since it uses less digits than its factorization.

11871530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107941.

The product of its (nonzero) digits is 840, while the sum is 26.

The square root of 11871530 is about 3445.5086707190. The cubic root of 11871530 is about 228.1229074681.

The spelling of 11871530 in words is "eleven million, eight hundred seventy-one thousand, five hundred thirty".