3126861 has 24 divisors (see below), whose sum is σ = 4852224. Its totient is φ = 1933440.

The previous prime is 3126857. The next prime is 3126869. The reversal of 3126861 is 1686213.

3126861 = T₅₉₈ + T₅₉₉ + ... + T₆₁₄.

It is not a de Polignac number, because 3126861 - 2² = 3126857 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3126869) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16276 + ... + 16466.

It is an arithmetic number, because the mean of its divisors is an integer number (202176).

Almost surely, 2^3126861 is an apocalyptic number.

It is an amenable number.

3126861 is a deficient number, since it is larger than the sum of its proper divisors (1725363).

3126861 is a wasteful number, since it uses less digits than its factorization.

3126861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321 (or 318 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 3126861 is about 1768.2932449116. The cubic root of 3126861 is about 146.2299030022.

It can be divided in two parts, 31268 and 61, that added together give a square (31329 = 177²).

The spelling of 3126861 in words is "three million, one hundred twenty-six thousand, eight hundred sixty-one".