1280898797 has 4 divisors (see below), whose sum is σ = 1284590496. Its totient is φ = 1277207100.

The previous prime is 1280898793. The next prime is 1280898799. The reversal of 1280898797 is 7978980821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1280898797 - 2² = 1280898793 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280898793) 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, 1845329 + ... + 1846022.

It is an arithmetic number, because the mean of its divisors is an integer number (321147624).

Almost surely, 2^1280898797 is an apocalyptic number.

It is an amenable number.

1280898797 is a deficient number, since it is larger than the sum of its proper divisors (3691699).

1280898797 is an equidigital number, since it uses as much as digits as its factorization.

1280898797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3691698.

The product of its (nonzero) digits is 4064256, while the sum is 59.

The square root of 1280898797 is about 35789.6465056586. The cubic root of 1280898797 is about 1086.0211236786.

The spelling of 1280898797 in words is "one billion, two hundred eighty million, eight hundred ninety-eight thousand, seven hundred ninety-seven".