1921280469 has 8 divisors (see below), whose sum is σ = 2590490880. Its totient is φ = 1266461856.

The previous prime is 1921280467. The next prime is 1921280477. The reversal of 1921280469 is 9640821291.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1921280469 - 2¹ = 1921280467 is a prime.

It is a super-2 number, since 2×1921280469² = 7382637281121719922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1921280469.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1921280467) 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, 3597637 + ... + 3598170.

It is an arithmetic number, because the mean of its divisors is an integer number (323811360).

Almost surely, 2^1921280469 is an apocalyptic number.

It is an amenable number.

1921280469 is a deficient number, since it is larger than the sum of its proper divisors (669210411).

1921280469 is an equidigital number, since it uses as much as digits as its factorization.

1921280469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7195899.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 1921280469 is about 43832.4134516912. The cubic root of 1921280469 is about 1243.1692406277.

It can be divided in two parts, 19212 and 80469, that added together give a triangular number (99681 = T₄₄₆).

The spelling of 1921280469 in words is "one billion, nine hundred twenty-one million, two hundred eighty thousand, four hundred sixty-nine".