1921048265 has 4 divisors (see below), whose sum is σ = 2305257924. Its totient is φ = 1536838608.

The previous prime is 1921048243. The next prime is 1921048267. The reversal of 1921048265 is 5628401291.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1006348729 + 914699536 = 31723^2 + 30244^2 .

It is a cyclic number.

It is not a de Polignac number, because 1921048265 - 2²⁶ = 1853939401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1921048267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192104822 + ... + 192104831.

It is an arithmetic number, because the mean of its divisors is an integer number (576314481).

Almost surely, 2^1921048265 is an apocalyptic number.

It is an amenable number.

1921048265 is a deficient number, since it is larger than the sum of its proper divisors (384209659).

1921048265 is an equidigital number, since it uses as much as digits as its factorization.

1921048265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384209658.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 1921048265 is about 43829.7646012387. The cubic root of 1921048265 is about 1243.1191558873.

The spelling of 1921048265 in words is "one billion, nine hundred twenty-one million, forty-eight thousand, two hundred sixty-five".