12011858 has 16 divisors (see below), whose sum is σ = 18901080. Its totient is φ = 5717376.

The previous prime is 12011833. The next prime is 12011861. The reversal of 12011858 is 85811021.

12011858 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 4 ways, for example, as 7656289 + 4355569 = 2767^2 + 2087^2 .

It is a super-2 number, since 2×12011858² = 288569465224328, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2816 + ... + 5652.

Almost surely, 2^12011858 is an apocalyptic number.

12011858 is a deficient number, since it is larger than the sum of its proper divisors (6889222).

12011858 is a wasteful number, since it uses less digits than its factorization.

12011858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2941.

The product of its (nonzero) digits is 640, while the sum is 26.

The square root of 12011858 is about 3465.8127473942. The cubic root of 12011858 is about 229.0182349152.

Adding to 12011858 its reverse (85811021), we get a palindrome (97822879).

The spelling of 12011858 in words is "twelve million, eleven thousand, eight hundred fifty-eight".