1283779545 has 8 divisors (see below), whose sum is σ = 2054047296. Its totient is φ = 684682416.

The previous prime is 1283779421. The next prime is 1283779559. The reversal of 1283779545 is 5459773821.

1283779545 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1283779545 - 2⁹ = 1283779033 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42792637 + ... + 42792666.

It is an arithmetic number, because the mean of its divisors is an integer number (256755912).

Almost surely, 2^1283779545 is an apocalyptic number.

1283779545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1283779545 is a deficient number, since it is larger than the sum of its proper divisors (770267751).

1283779545 is an equidigital number, since it uses as much as digits as its factorization.

1283779545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85585311.

The product of its digits is 2116800, while the sum is 51.

The square root of 1283779545 is about 35829.8694527345. The cubic root of 1283779545 is about 1086.8346697959.

The spelling of 1283779545 in words is "one billion, two hundred eighty-three million, seven hundred seventy-nine thousand, five hundred forty-five".