1891256 has 8 divisors (see below), whose sum is σ = 3546120. Its totient is φ = 945624.

The previous prime is 1891249. The next prime is 1891273. The reversal of 1891256 is 6521981.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 118196 + ... + 118211.

It is an arithmetic number, because the mean of its divisors is an integer number (443265).

2^1891256 is an apocalyptic number.

It is an amenable number.

1891256 is a deficient number, since it is larger than the sum of its proper divisors (1654864).

1891256 is a wasteful number, since it uses less digits than its factorization.

1891256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236413 (or 236409 counting only the distinct ones).

The product of its digits is 4320, while the sum is 32.

The square root of 1891256 is about 1375.2294354034. The cubic root of 1891256 is about 123.6659409420.

The spelling of 1891256 in words is "one million, eight hundred ninety-one thousand, two hundred fifty-six".