3155491 has 4 divisors (see below), whose sum is σ = 3159472. Its totient is φ = 3151512.

The previous prime is 3155473. The next prime is 3155513. The reversal of 3155491 is 1945513.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1945513 = 127 ⋅15319.

It is a cyclic number.

It is not a de Polignac number, because 3155491 - 2⁷ = 3155363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3155791) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 351 + ... + 2536.

It is an arithmetic number, because the mean of its divisors is an integer number (789868).

Almost surely, 2^3155491 is an apocalyptic number.

3155491 is a deficient number, since it is larger than the sum of its proper divisors (3981).

3155491 is a wasteful number, since it uses less digits than its factorization.

3155491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3980.

The product of its digits is 2700, while the sum is 28.

The square root of 3155491 is about 1776.3701753857. The cubic root of 3155491 is about 146.6748486023.

The spelling of 3155491 in words is "three million, one hundred fifty-five thousand, four hundred ninety-one".