12013858 has 8 divisors (see below), whose sum is σ = 18404352. Its totient is φ = 5879076.

The previous prime is 12013847. The next prime is 12013867. The reversal of 12013858 is 85831021.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 63810 + ... + 63997.

It is an arithmetic number, because the mean of its divisors is an integer number (2300544).

Almost surely, 2^12013858 is an apocalyptic number.

12013858 is a deficient number, since it is larger than the sum of its proper divisors (6390494).

12013858 is a wasteful number, since it uses less digits than its factorization.

12013858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127856.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 12013858 is about 3466.1012679955. The cubic root of 12013858 is about 229.0309448848.

Adding to 12013858 its reverse (85831021), we get a palindrome (97844879).

The spelling of 12013858 in words is "twelve million, thirteen thousand, eight hundred fifty-eight".