3145855 has 4 divisors (see below), whose sum is σ = 3775032. Its totient is φ = 2516680.

The previous prime is 3145841. The next prime is 3145873. The reversal of 3145855 is 5585413.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5585413 = 191 ⋅29243.

It is not a de Polignac number, because 3145855 - 2⁵ = 3145823 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 314581 + ... + 314590.

It is an arithmetic number, because the mean of its divisors is an integer number (943758).

Almost surely, 2^3145855 is an apocalyptic number.

3145855 is a deficient number, since it is larger than the sum of its proper divisors (629177).

3145855 is an equidigital number, since it uses as much as digits as its factorization.

3145855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629176.

The product of its digits is 12000, while the sum is 31.

The square root of 3145855 is about 1773.6558290717. The cubic root of 3145855 is about 146.5253948452.

It can be divided in two parts, 31458 and 55, that added together give a palindrome (31513).

The spelling of 3145855 in words is "three million, one hundred forty-five thousand, eight hundred fifty-five".