1280885173 has 8 divisors (see below), whose sum is σ = 1287022680. Its totient is φ = 1274757120.

The previous prime is 1280885159. The next prime is 1280885201. The reversal of 1280885173 is 3715880821.

It can be written as a sum of positive squares in 4 ways, for example, as 495596644 + 785288529 = 22262^2 + 28023^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1280885173 - 2¹³ = 1280876981 is a prime.

It is a super-2 number, since 2×1280885173² = 3281333652822479858, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280885143) 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, 545983 + ... + 548323.

It is an arithmetic number, because the mean of its divisors is an integer number (160877835).

Almost surely, 2^1280885173 is an apocalyptic number.

It is an amenable number.

1280885173 is a deficient number, since it is larger than the sum of its proper divisors (6137507).

1280885173 is a wasteful number, since it uses less digits than its factorization.

1280885173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4727.

The product of its (nonzero) digits is 107520, while the sum is 43.

The square root of 1280885173 is about 35789.4561707774. The cubic root of 1280885173 is about 1086.0172732562.

The spelling of 1280885173 in words is "one billion, two hundred eighty million, eight hundred eighty-five thousand, one hundred seventy-three".