11905857 has 6 divisors (see below), whose sum is σ = 17197362. Its totient is φ = 7937232.

The previous prime is 11905849. The next prime is 11905871. The reversal of 11905857 is 75850911.

11905857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 10653696 + 1252161 = 3264^2 + 1119^2 .

It is not a de Polignac number, because 11905857 - 2³ = 11905849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11905807) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 661428 + ... + 661445.

It is an arithmetic number, because the mean of its divisors is an integer number (2866227).

Almost surely, 2^11905857 is an apocalyptic number.

It is an amenable number.

11905857 is a deficient number, since it is larger than the sum of its proper divisors (5291505).

11905857 is a wasteful number, since it uses less digits than its factorization.

11905857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322879 (or 1322876 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 36.

The square root of 11905857 is about 3450.4864874391. The cubic root of 11905857 is about 228.3425713610.

The spelling of 11905857 in words is "eleven million, nine hundred five thousand, eight hundred fifty-seven".