1280224302409 has 4 divisors (see below), whose sum is σ = 1378703094916. Its totient is φ = 1181745509904.

The previous prime is 1280224302361. The next prime is 1280224302431. The reversal of 1280224302409 is 9042034220821.

It is a happy number.

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 61220615184 + 1219003687225 = 247428^2 + 1104085^2 .

It is a cyclic number.

It is not a de Polignac number, because 1280224302409 - 2¹⁹ = 1280223778121 is a prime.

It is a super-2 number, since 2×1280224302409² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1280224302109) 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, 49239396234 + ... + 49239396259.

It is an arithmetic number, because the mean of its divisors is an integer number (344675773729).

Almost surely, 2^{1280224302409} is an apocalyptic number.

It is an amenable number.

1280224302409 is a deficient number, since it is larger than the sum of its proper divisors (98478792507).

1280224302409 is an equidigital number, since it uses as much as digits as its factorization.

1280224302409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98478792506.

The product of its (nonzero) digits is 55296, while the sum is 37.

The spelling of 1280224302409 in words is "one trillion, two hundred eighty billion, two hundred twenty-four million, three hundred two thousand, four hundred nine".