1956891 has 16 divisors (see below), whose sum is σ = 2741760. Its totient is φ = 1239840.

The previous prime is 1956883. The next prime is 1956901. The reversal of 1956891 is 1986591.

It is not a de Polignac number, because 1956891 - 2³ = 1956883 is a prime.

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 (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7086 + ... + 7356.

It is an arithmetic number, because the mean of its divisors is an integer number (171360).

2^1956891 is an apocalyptic number.

1956891 is a deficient number, since it is larger than the sum of its proper divisors (784869).

1956891 is a wasteful number, since it uses less digits than its factorization.

1956891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386.

The product of its digits is 19440, while the sum is 39.

The square root of 1956891 is about 1398.8892021887. The cubic root of 1956891 is about 125.0802897507.

The spelling of 1956891 in words is "one million, nine hundred fifty-six thousand, eight hundred ninety-one".