1956861 has 6 divisors (see below), whose sum is σ = 2826590. Its totient is φ = 1304568.

The previous prime is 1956859. The next prime is 1956881. The reversal of 1956861 is 1686591.

It can be written as a sum of positive squares in only one way, i.e., 1863225 + 93636 = 1365^2 + 306^2 .

It is not a de Polignac number, because 1956861 - 2¹ = 1956859 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1956811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 108706 + ... + 108723.

2^1956861 is an apocalyptic number.

It is an amenable number.

1956861 is a deficient number, since it is larger than the sum of its proper divisors (869729).

1956861 is a wasteful number, since it uses less digits than its factorization.

1956861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217435 (or 217432 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 1956861 is about 1398.8784793541. The cubic root of 1956861 is about 125.0796505688.

It can be divided in two parts, 195 and 6861, that added together give a square (7056 = 84²).

The spelling of 1956861 in words is "one million, nine hundred fifty-six thousand, eight hundred sixty-one".