1921253 has 2 divisors, whose sum is σ = 1921254. Its totient is φ = 1921252.

The previous prime is 1921247. The next prime is 1921267. The reversal of 1921253 is 3521291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1643524 + 277729 = 1282^2 + 527^2 .

It is an emirp because it is prime and its reverse (3521291) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1921253 - 2¹⁴ = 1904869 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1921273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 960626 + 960627.

It is an arithmetic number, because the mean of its divisors is an integer number (960627).

2^1921253 is an apocalyptic number.

It is an amenable number.

1921253 is a deficient number, since it is larger than the sum of its proper divisors (1).

1921253 is an equidigital number, since it uses as much as digits as its factorization.

1921253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 540, while the sum is 23.

The square root of 1921253 is about 1386.0927097420. The cubic root of 1921253 is about 124.3163315972.

The spelling of 1921253 in words is "one million, nine hundred twenty-one thousand, two hundred fifty-three".