3155391 has 12 divisors (see below), whose sum is σ = 4580680. Its totient is φ = 2093040.

The previous prime is 3155389. The next prime is 3155407. The reversal of 3155391 is 1935513.

It is not a de Polignac number, because 3155391 - 2¹ = 3155389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3155371) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1296 + ... + 2826.

Almost surely, 2^3155391 is an apocalyptic number.

3155391 is a deficient number, since it is larger than the sum of its proper divisors (1425289).

3155391 is a wasteful number, since it uses less digits than its factorization.

3155391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1766 (or 1763 counting only the distinct ones).

The product of its digits is 2025, while the sum is 27.

The square root of 3155391 is about 1776.3420278764. The cubic root of 3155391 is about 146.6732991721.

The spelling of 3155391 in words is "three million, one hundred fifty-five thousand, three hundred ninety-one".