11847861 has 24 divisors (see below), whose sum is σ = 18255744. Its totient is φ = 7378560.

The previous prime is 11847853. The next prime is 11847877. The reversal of 11847861 is 16874811.

11847861 = 124² + 125² + ... + 334².

11847861 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 11847861 - 2³ = 11847853 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11847061) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32100 + ... + 32466.

It is an arithmetic number, because the mean of its divisors is an integer number (760656).

Almost surely, 2^11847861 is an apocalyptic number.

It is an amenable number.

11847861 is a deficient number, since it is larger than the sum of its proper divisors (6407883).

11847861 is a wasteful number, since it uses less digits than its factorization.

11847861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601 (or 598 counting only the distinct ones).

The product of its digits is 10752, while the sum is 36.

The square root of 11847861 is about 3442.0721956403. The cubic root of 11847861 is about 227.9711990398.

It can be divided in two parts, 1184 and 7861, that added together give a triangular number (9045 = T₁₃₄).

The spelling of 11847861 in words is "eleven million, eight hundred forty-seven thousand, eight hundred sixty-one".