1285616753 has 2 divisors, whose sum is σ = 1285616754. Its totient is φ = 1285616752.

The previous prime is 1285616749. The next prime is 1285616819. The reversal of 1285616753 is 3576165821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1273561969 + 12054784 = 35687^2 + 3472^2 .

It is a cyclic number.

It is not a de Polignac number, because 1285616753 - 2² = 1285616749 is a prime.

It is not a weakly prime, because it can be changed into another prime (1285616743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642808376 + 642808377.

It is an arithmetic number, because the mean of its divisors is an integer number (642808377).

Almost surely, 2^1285616753 is an apocalyptic number.

It is an amenable number.

1285616753 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285616753 is an equidigital number, since it uses as much as digits as its factorization.

1285616753 is an evil number, because the sum of its binary digits is even.

The product of its digits is 302400, while the sum is 44.

The square root of 1285616753 is about 35855.4982255163. The cubic root of 1285616753 is about 1087.3528765256.

The spelling of 1285616753 in words is "one billion, two hundred eighty-five million, six hundred sixteen thousand, seven hundred fifty-three".