1280287541297 has 16 divisors (see below), whose sum is σ = 1407879539280. Its totient is φ = 1159236384768.

The previous prime is 1280287541251. The next prime is 1280287541303. The reversal of 1280287541297 is 7921457820821.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 342132576241 + 938154965056 = 584921^2 + 968584^2 .

It is a cyclic number.

It is not a de Polignac number, because 1280287541297 - 2⁸ = 1280287541041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1280287541227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11379038 + ... + 11490999.

It is an arithmetic number, because the mean of its divisors is an integer number (87992471205).

Almost surely, 2^{1280287541297} is an apocalyptic number.

1280287541297 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1280287541297 is a deficient number, since it is larger than the sum of its proper divisors (127591997983).

1280287541297 is a wasteful number, since it uses less digits than its factorization.

1280287541297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22870180.

The product of its (nonzero) digits is 4515840, while the sum is 56.

The spelling of 1280287541297 in words is "one trillion, two hundred eighty billion, two hundred eighty-seven million, five hundred forty-one thousand, two hundred ninety-seven".