1921267 has 2 divisors, whose sum is σ = 1921268. Its totient is φ = 1921266.

The previous prime is 1921253. The next prime is 1921273. The reversal of 1921267 is 7621291.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1921267 - 2¹⁹ = 1396979 is a prime.

It is not a weakly prime, because it can be changed into another prime (1921247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 960633 + 960634.

It is an arithmetic number, because the mean of its divisors is an integer number (960634).

2^1921267 is an apocalyptic number.

1921267 is a deficient number, since it is larger than the sum of its proper divisors (1).

1921267 is an equidigital number, since it uses as much as digits as its factorization.

1921267 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 28.

The square root of 1921267 is about 1386.0977599001. The cubic root of 1921267 is about 124.3166335571.

The spelling of 1921267 in words is "one million, nine hundred twenty-one thousand, two hundred sixty-seven".