3145813 has 4 divisors (see below), whose sum is σ = 3431808. Its totient is φ = 2859820.

The previous prime is 3145801. The next prime is 3145817. The reversal of 3145813 is 3185413.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3145813 - 2⁵ = 3145781 is a prime.

It is a super-2 number, since 2×3145813² = 19792278861938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent 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, 142981 + ... + 143002.

It is an arithmetic number, because the mean of its divisors is an integer number (857952).

Almost surely, 2^3145813 is an apocalyptic number.

It is an amenable number.

3145813 is a deficient number, since it is larger than the sum of its proper divisors (285995).

3145813 is a wasteful number, since it uses less digits than its factorization.

3145813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285994.

The product of its digits is 1440, while the sum is 25.

The square root of 3145813 is about 1773.6439890801. The cubic root of 3145813 is about 146.5247427603.

The spelling of 3145813 in words is "three million, one hundred forty-five thousand, eight hundred thirteen".