1921256 has 32 divisors (see below), whose sum is σ = 3809280. Its totient is φ = 907200.

The previous prime is 1921253. The next prime is 1921267. The reversal of 1921256 is 6521291.

It is not an unprimeable number, because it can be changed into a prime (1921253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15065 + ... + 15191.

It is an arithmetic number, because the mean of its divisors is an integer number (119040).

2^1921256 is an apocalyptic number.

It is an amenable number.

1921256 is a deficient number, since it is larger than the sum of its proper divisors (1888024).

1921256 is a wasteful number, since it uses less digits than its factorization.

1921256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225 (or 221 counting only the distinct ones).

The product of its digits is 1080, while the sum is 26.

The square root of 1921256 is about 1386.0937919203. The cubic root of 1921256 is about 124.3163963030.

The spelling of 1921256 in words is "one million, nine hundred twenty-one thousand, two hundred fifty-six".