3145811 has 4 divisors (see below), whose sum is σ = 3311400. Its totient is φ = 2980224.

The previous prime is 3145801. The next prime is 3145817. The reversal of 3145811 is 1185413.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1185413 = 61 ⋅19433.

It is a cyclic number.

It is not a de Polignac number, because 3145811 - 2¹⁸ = 2883667 is a prime.

It is a super-2 number, since 2×3145811² = 19792253695442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3145817) 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, 82766 + ... + 82803.

It is an arithmetic number, because the mean of its divisors is an integer number (827850).

Almost surely, 2^3145811 is an apocalyptic number.

3145811 is a deficient number, since it is larger than the sum of its proper divisors (165589).

3145811 is a wasteful number, since it uses less digits than its factorization.

3145811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165588.

The product of its digits is 480, while the sum is 23.

The square root of 3145811 is about 1773.6434252690. The cubic root of 3145811 is about 146.5247117085.

The spelling of 3145811 in words is "three million, one hundred forty-five thousand, eight hundred eleven".