3012861 has 4 divisors (see below), whose sum is σ = 4017152. Its totient is φ = 2008572.

The previous prime is 3012827. The next prime is 3012871. The reversal of 3012861 is 1682103.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1682103 = 3 ⋅560701.

It is not a de Polignac number, because 3012861 - 2¹³ = 3004669 is a prime.

It is a D-number.

It is a Duffinian number.

3012861 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3012871) 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, 502141 + ... + 502146.

It is an arithmetic number, because the mean of its divisors is an integer number (1004288).

Almost surely, 2^3012861 is an apocalyptic number.

It is an amenable number.

3012861 is a deficient number, since it is larger than the sum of its proper divisors (1004291).

3012861 is a wasteful number, since it uses less digits than its factorization.

3012861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1004290.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 3012861 is about 1735.7594879476. The cubic root of 3012861 is about 144.4307606805.

Adding to 3012861 its reverse (1682103), we get a palindrome (4694964).

The spelling of 3012861 in words is "three million, twelve thousand, eight hundred sixty-one".