1284457105 has 4 divisors (see below), whose sum is σ = 1541348532. Its totient is φ = 1027565680.

The previous prime is 1284457099. The next prime is 1284457123. The reversal of 1284457105 is 5017544821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5017544821 = 53 ⋅94670657.

It can be written as a sum of positive squares in 2 ways, for example, as 857084176 + 427372929 = 29276^2 + 20673^2 .

It is not a de Polignac number, because 1284457105 - 2⁵ = 1284457073 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128445706 + ... + 128445715.

It is an arithmetic number, because the mean of its divisors is an integer number (385337133).

Almost surely, 2^1284457105 is an apocalyptic number.

It is an amenable number.

1284457105 is a deficient number, since it is larger than the sum of its proper divisors (256891427).

1284457105 is an equidigital number, since it uses as much as digits as its factorization.

1284457105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256891426.

The product of its (nonzero) digits is 44800, while the sum is 37.

The square root of 1284457105 is about 35839.3234450652. The cubic root of 1284457105 is about 1087.0258412959.

The spelling of 1284457105 in words is "one billion, two hundred eighty-four million, four hundred fifty-seven thousand, one hundred five".