3145255861 has 4 divisors (see below), whose sum is σ = 3431188224. Its totient is φ = 2859323500.

The previous prime is 3145255849. The next prime is 3145255879. The reversal of 3145255861 is 1685525413.

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 not a de Polignac number, because 3145255861 - 2¹⁵ = 3145223093 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3145255961) 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, 142966165 + ... + 142966186.

It is an arithmetic number, because the mean of its divisors is an integer number (857797056).

Almost surely, 2^3145255861 is an apocalyptic number.

It is an amenable number.

3145255861 is a deficient number, since it is larger than the sum of its proper divisors (285932363).

3145255861 is a wasteful number, since it uses less digits than its factorization.

3145255861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285932362.

The product of its digits is 144000, while the sum is 40.

The square root of 3145255861 is about 56082.5807269958. The cubic root of 3145255861 is about 1465.1609216468.

The spelling of 3145255861 in words is "three billion, one hundred forty-five million, two hundred fifty-five thousand, eight hundred sixty-one".