1280420897 has 8 divisors (see below), whose sum is σ = 1472102016. Its totient is φ = 1090930752.

The previous prime is 1280420881. The next prime is 1280420903. The reversal of 1280420897 is 7980240821.

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 1280420897 - 2⁴ = 1280420881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1280420597) 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, 546488 + ... + 548825.

It is an arithmetic number, because the mean of its divisors is an integer number (184012752).

Almost surely, 2^1280420897 is an apocalyptic number.

It is an amenable number.

1280420897 is a deficient number, since it is larger than the sum of its proper divisors (191681119).

1280420897 is a wasteful number, since it uses less digits than its factorization.

1280420897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095487.

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 1280420897 is about 35782.9693709172. The cubic root of 1280420897 is about 1085.8860429950.

The spelling of 1280420897 in words is "one billion, two hundred eighty million, four hundred twenty thousand, eight hundred ninety-seven".