3055861 has 4 divisors (see below), whose sum is σ = 3059532. Its totient is φ = 3052192.

The previous prime is 3055847. The next prime is 3055873. The reversal of 3055861 is 1685503.

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.

It can be written as a sum of positive squares in 2 ways, for example, as 820836 + 2235025 = 906^2 + 1495^2 .

It is a cyclic number.

It is not a de Polignac number, because 3055861 - 2¹³ = 3047669 is a prime.

It is a Duffinian number.

3055861 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3055831) 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, 81 + ... + 2473.

It is an arithmetic number, because the mean of its divisors is an integer number (764883).

Almost surely, 2^3055861 is an apocalyptic number.

It is an amenable number.

3055861 is a deficient number, since it is larger than the sum of its proper divisors (3671).

3055861 is a wasteful number, since it uses less digits than its factorization.

3055861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3670.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 3055861 is about 1748.1021137222. The cubic root of 3055861 is about 145.1146299260.

It can be divided in two parts, 3055 and 861, that added together give a triangular number (3916 = T₈₈).

The spelling of 3055861 in words is "three million, fifty-five thousand, eight hundred sixty-one".