11871015 has 32 divisors (see below), whose sum is σ = 21663936. Its totient is φ = 5498880.

The previous prime is 11871007. The next prime is 11871019. The reversal of 11871015 is 51017811.

11871015 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11871015 - 2³ = 11871007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11871019) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1525 + ... + 5105.

It is an arithmetic number, because the mean of its divisors is an integer number (676998).

Almost surely, 2^11871015 is an apocalyptic number.

11871015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11871015 is a deficient number, since it is larger than the sum of its proper divisors (9792921).

11871015 is a wasteful number, since it uses less digits than its factorization.

11871015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3619.

The product of its (nonzero) digits is 280, while the sum is 24.

The square root of 11871015 is about 3445.4339349348. The cubic root of 11871015 is about 228.1196086797.

Adding to 11871015 its reverse (51017811), we get a palindrome (62888826).

The spelling of 11871015 in words is "eleven million, eight hundred seventy-one thousand, fifteen".