1283778625 has 16 divisors (see below), whose sum is σ = 1626079104. Its totient is φ = 1011687600.

The previous prime is 1283778553. The next prime is 1283778637. The reversal of 1283778625 is 5268773821.

It is not a de Polignac number, because 1283778625 - 2⁹ = 1283778113 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 (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68269 + ... + 85018.

It is an arithmetic number, because the mean of its divisors is an integer number (101629944).

Almost surely, 2^1283778625 is an apocalyptic number.

It is an amenable number.

1283778625 is a deficient number, since it is larger than the sum of its proper divisors (342300479).

1283778625 is an equidigital number, since it uses as much as digits as its factorization.

1283778625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153369 (or 153359 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 49.

The square root of 1283778625 is about 35829.8566142819. The cubic root of 1283778625 is about 1086.8344101749.

The spelling of 1283778625 in words is "one billion, two hundred eighty-three million, seven hundred seventy-eight thousand, six hundred twenty-five".