1283257897 has 4 divisors (see below), whose sum is σ = 1283487316. Its totient is φ = 1283028480.

The previous prime is 1283257879. The next prime is 1283257933. The reversal of 1283257897 is 7987523821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 139736041 + 1143521856 = 11821^2 + 33816^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1283257897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1283257817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106104 + ... + 117577.

It is an arithmetic number, because the mean of its divisors is an integer number (320871829).

Almost surely, 2^1283257897 is an apocalyptic number.

It is an amenable number.

1283257897 is a deficient number, since it is larger than the sum of its proper divisors (229419).

1283257897 is an equidigital number, since it uses as much as digits as its factorization.

1283257897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229418.

The product of its digits is 1693440, while the sum is 52.

The square root of 1283257897 is about 35822.5892001123. The cubic root of 1283257897 is about 1086.6874425605.

It can be divided in two parts, 128 and 3257897, that added together give a square (3258025 = 1805²).

The spelling of 1283257897 in words is "one billion, two hundred eighty-three million, two hundred fifty-seven thousand, eight hundred ninety-seven".