1280551001 has 8 divisors (see below), whose sum is σ = 1287527400. Its totient is φ = 1273592320.

The previous prime is 1280550977. The next prime is 1280551003. The reversal of 1280551001 is 1001550821.

It can be written as a sum of positive squares in 4 ways, for example, as 170328601 + 1110222400 = 13051^2 + 33320^2 .

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 1280551001 - 2¹⁸ = 1280288857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1280551003) 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, 155885 + ... + 163893.

It is an arithmetic number, because the mean of its divisors is an integer number (160940925).

Almost surely, 2^1280551001 is an apocalyptic number.

It is an amenable number.

1280551001 is a deficient number, since it is larger than the sum of its proper divisors (6976399).

1280551001 is an equidigital number, since it uses as much as digits as its factorization.

1280551001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8859.

The product of its (nonzero) digits is 400, while the sum is 23.

The square root of 1280551001 is about 35784.7872845431. The cubic root of 1280551001 is about 1085.9228208320.

The spelling of 1280551001 in words is "one billion, two hundred eighty million, five hundred fifty-one thousand, one".