3155891 has 4 divisors (see below), whose sum is σ = 3159984. Its totient is φ = 3151800.

The previous prime is 3155839. The next prime is 3155923. The reversal of 3155891 is 1985513.

3155891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 3155891 - 2⁶ = 3155827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3155821) by changing a digit.

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, 500 + ... + 2561.

It is an arithmetic number, because the mean of its divisors is an integer number (789996).

Almost surely, 2^3155891 is an apocalyptic number.

3155891 is a deficient number, since it is larger than the sum of its proper divisors (4093).

3155891 is a wasteful number, since it uses less digits than its factorization.

3155891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4092.

The product of its digits is 5400, while the sum is 32.

The square root of 3155891 is about 1776.4827609634. The cubic root of 3155891 is about 146.6810459961.

The spelling of 3155891 in words is "three million, one hundred fifty-five thousand, eight hundred ninety-one".